99975437 has 4 divisors (see below), whose sum is σ = 101861820. Its totient is φ = 98089056.

The previous prime is 99975427. The next prime is 99975451. The reversal of 99975437 is 73457999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73457999 = 3413 ⋅21523.

It can be written as a sum of positive squares in 2 ways, for example, as 85581001 + 14394436 = 9251^2 + 3794^2 .

It is a cyclic number.

It is not a de Polignac number, because 99975437 - 2²⁶ = 32866573 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 1886329 = 99975437 / (9 + 9 + 9 + 7 + 5 + 4 + 3 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99975427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943112 + ... + 943217.

It is an arithmetic number, because the mean of its divisors is an integer number (25465455).

Almost surely, 2^99975437 is an apocalyptic number.

It is an amenable number.

99975437 is a deficient number, since it is larger than the sum of its proper divisors (1886383).

99975437 is a wasteful number, since it uses less digits than its factorization.

99975437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886382.

The product of its digits is 2143260, while the sum is 53.

The square root of 99975437 is about 9998.7717745731. The cubic root of 99975437 is about 464.1208764671.

The spelling of 99975437 in words is "ninety-nine million, nine hundred seventy-five thousand, four hundred thirty-seven".