90794978 has 4 divisors (see below), whose sum is σ = 136192470. Its totient is φ = 45397488.

The previous prime is 90794971. The next prime is 90794981. The reversal of 90794978 is 87949709.

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., 84953089 + 5841889 = 9217^2 + 2417^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90794971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22698743 + ... + 22698746.

Almost surely, 2^90794978 is an apocalyptic number.

90794978 is a deficient number, since it is larger than the sum of its proper divisors (45397492).

90794978 is a wasteful number, since it uses less digits than its factorization.

90794978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45397491.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 90794978 is about 9528.6398819559. The cubic root of 90794978 is about 449.4560967727.

The spelling of 90794978 in words is "ninety million, seven hundred ninety-four thousand, nine hundred seventy-eight".