90992811 has 24 divisors (see below), whose sum is σ = 150147840. Its totient is φ = 47994336.

The previous prime is 90992801. The next prime is 90992827. The reversal of 90992811 is 11829909.

It is a happy number.

It is not a de Polignac number, because 90992811 - 2⁵ = 90992779 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 90992811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90992801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9271 + ... + 16368.

It is an arithmetic number, because the mean of its divisors is an integer number (6256160).

Almost surely, 2^90992811 is an apocalyptic number.

90992811 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

90992811 is a deficient number, since it is larger than the sum of its proper divisors (59155029).

90992811 is a wasteful number, since it uses less digits than its factorization.

90992811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25675 (or 25662 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 90992811 is about 9539.0152007427. The cubic root of 90992811 is about 449.7822996365.

The spelling of 90992811 in words is "ninety million, nine hundred ninety-two thousand, eight hundred eleven".