90797797 has 4 divisors (see below), whose sum is σ = 92153056. Its totient is φ = 89442540.

The previous prime is 90797779. The next prime is 90797801. The reversal of 90797797 is 79779709.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90797797 - 2¹⁵ = 90765029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90797717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677529 + ... + 677662.

It is an arithmetic number, because the mean of its divisors is an integer number (23038264).

Almost surely, 2^90797797 is an apocalyptic number.

It is an amenable number.

90797797 is a deficient number, since it is larger than the sum of its proper divisors (1355259).

90797797 is a wasteful number, since it uses less digits than its factorization.

90797797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355258.

The product of its (nonzero) digits is 1750329, while the sum is 55.

The square root of 90797797 is about 9528.7878032833. The cubic root of 90797797 is about 449.4607482915.

The spelling of 90797797 in words is "ninety million, seven hundred ninety-seven thousand, seven hundred ninety-seven".