90890945234 has 4 divisors (see below), whose sum is σ = 136336417854. Its totient is φ = 45445472616.

The previous prime is 90890945203. The next prime is 90890945237. The reversal of 90890945234 is 43254909809.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 88359346009 + 2531599225 = 297253^2 + 50315^2 .

It is a super-2 number, since 2×90890945234² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90890945237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22722736307 + ... + 22722736310.

Almost surely, 2^90890945234 is an apocalyptic number.

90890945234 is a deficient number, since it is larger than the sum of its proper divisors (45445472620).

90890945234 is a wasteful number, since it uses less digits than its factorization.

90890945234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45445472619.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 90890945234 in words is "ninety billion, eight hundred ninety million, nine hundred forty-five thousand, two hundred thirty-four".