90969994 has 4 divisors (see below), whose sum is σ = 136454994. Its totient is φ = 45484996.

The previous prime is 90969979. The next prime is 90969997. The reversal of 90969994 is 49996909.

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., 90954369 + 15625 = 9537^2 + 125^2 .

It is not an unprimeable number, because it can be changed into a prime (90969997) 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 as a sum of consecutive naturals, namely, 22742497 + ... + 22742500.

Almost surely, 2^90969994 is an apocalyptic number.

90969994 is a deficient number, since it is larger than the sum of its proper divisors (45485000).

90969994 is a wasteful number, since it uses less digits than its factorization.

90969994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45484999.

The product of its (nonzero) digits is 1417176, while the sum is 55.

The square root of 90969994 is about 9537.8191427600. The cubic root of 90969994 is about 449.7447012792.

The spelling of 90969994 in words is "ninety million, nine hundred sixty-nine thousand, nine hundred ninety-four".