90195437 has 4 divisors (see below), whose sum is σ = 90214656. Its totient is φ = 90176220.

The previous prime is 90195407. The next prime is 90195439. The reversal of 90195437 is 73459109.

It is a happy number.

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 90195437 - 2⁶ = 90195373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90195437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90195439) 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, 2612 + ... + 13682.

It is an arithmetic number, because the mean of its divisors is an integer number (22553664).

Almost surely, 2^90195437 is an apocalyptic number.

It is an amenable number.

90195437 is a deficient number, since it is larger than the sum of its proper divisors (19219).

90195437 is a wasteful number, since it uses less digits than its factorization.

90195437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19218.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 90195437 is about 9497.1278289807. The cubic root of 90195437 is about 448.4646224706.

The spelling of 90195437 in words is "ninety million, one hundred ninety-five thousand, four hundred thirty-seven".