90203956 has 6 divisors (see below), whose sum is σ = 157856930. Its totient is φ = 45101976.

The previous prime is 90203941. The next prime is 90203957. The reversal of 90203956 is 65930209.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 55204900 + 34999056 = 7430^2 + 5916^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90203957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11275491 + ... + 11275498.

Almost surely, 2^90203956 is an apocalyptic number.

It is an amenable number.

90203956 is a deficient number, since it is larger than the sum of its proper divisors (67652974).

90203956 is a wasteful number, since it uses less digits than its factorization.

90203956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22550993 (or 22550991 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 90203956 is about 9497.5763224098. The cubic root of 90203956 is about 448.4787412552.

The spelling of 90203956 in words is "ninety million, two hundred three thousand, nine hundred fifty-six".