91692890 has 16 divisors (see below), whose sum is σ = 165277800. Its totient is φ = 36625920.

The previous prime is 91692889. The next prime is 91692907. The reversal of 91692890 is 9829619.

It can be written as a sum of positive squares in 4 ways, for example, as 50566321 + 41126569 = 7111^2 + 6413^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1586 + ... + 13634.

Almost surely, 2^91692890 is an apocalyptic number.

91692890 is a deficient number, since it is larger than the sum of its proper divisors (73584910).

91692890 is a wasteful number, since it uses less digits than its factorization.

91692890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12817.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 91692890 is about 9575.6404485549. The cubic root of 91692890 is about 450.9328631650.

The spelling of 91692890 in words is "ninety-one million, six hundred ninety-two thousand, eight hundred ninety".