90618877 has 4 divisors (see below), whose sum is σ = 90953536. Its totient is φ = 90284220.

The previous prime is 90618851. The next prime is 90618889. The reversal of 90618877 is 77881609.

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, and also an emirpimes, since its reverse is a distinct semiprime: 77881609 = 13 ⋅5990893.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90618877 is a prime.

It is a super-2 number, since 2×90618877² = 16423561737482258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90618377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166923 + ... + 167464.

It is an arithmetic number, because the mean of its divisors is an integer number (22738384).

Almost surely, 2^90618877 is an apocalyptic number.

It is an amenable number.

90618877 is a deficient number, since it is larger than the sum of its proper divisors (334659).

90618877 is a wasteful number, since it uses less digits than its factorization.

90618877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334658.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 90618877 is about 9519.3947811823. The cubic root of 90618877 is about 449.1653285074.

The spelling of 90618877 in words is "ninety million, six hundred eighteen thousand, eight hundred seventy-seven".