91649426 has 32 divisors (see below), whose sum is σ = 161568000. Its totient is φ = 38540880.

The previous prime is 91649419. The next prime is 91649429. The reversal of 91649426 is 62494619.

It is a super-2 number, since 2×91649426² = 16799234572258952, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91649429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15425 + ... + 20523.

It is an arithmetic number, because the mean of its divisors is an integer number (5049000).

Almost surely, 2^91649426 is an apocalyptic number.

91649426 is a deficient number, since it is larger than the sum of its proper divisors (69918574).

91649426 is a wasteful number, since it uses less digits than its factorization.

91649426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5174.

The product of its digits is 93312, while the sum is 41.

The square root of 91649426 is about 9573.3706707721. The cubic root of 91649426 is about 450.8616019378.

The spelling of 91649426 in words is "ninety-one million, six hundred forty-nine thousand, four hundred twenty-six".