90901994 has 4 divisors (see below), whose sum is σ = 136352994. Its totient is φ = 45450996.

The previous prime is 90901991. The next prime is 90901997. The reversal of 90901994 is 49910909.

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

It is an interprime number because it is at equal distance from previous prime (90901991) and next prime (90901997).

It can be written as a sum of positive squares in only one way, i.e., 71656225 + 19245769 = 8465^2 + 4387^2 .

It is not an unprimeable number, because it can be changed into a prime (90901991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22725497 + ... + 22725500.

Almost surely, 2^90901994 is an apocalyptic number.

90901994 is a deficient number, since it is larger than the sum of its proper divisors (45451000).

90901994 is a wasteful number, since it uses less digits than its factorization.

90901994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45450999.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 90901994 is about 9534.2537201398. The cubic root of 90901994 is about 449.6326120738.

The spelling of 90901994 in words is "ninety million, nine hundred one thousand, nine hundred ninety-four".