99142637 has 4 divisors (see below), whose sum is σ = 108155616. Its totient is φ = 90129660.

The previous prime is 99142621. The next prime is 99142643. The reversal of 99142637 is 73624199.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99142637 - 2⁴ = 99142621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99142594 and 99142603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99142237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4506473 + ... + 4506494.

It is an arithmetic number, because the mean of its divisors is an integer number (27038904).

Almost surely, 2^99142637 is an apocalyptic number.

It is an amenable number.

99142637 is a deficient number, since it is larger than the sum of its proper divisors (9012979).

99142637 is a wasteful number, since it uses less digits than its factorization.

99142637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9012978.

The product of its digits is 81648, while the sum is 41.

The square root of 99142637 is about 9957.0395700730. The cubic root of 99142637 is about 462.8285653594.

The spelling of 99142637 in words is "ninety-nine million, one hundred forty-two thousand, six hundred thirty-seven".