90977811 has 16 divisors (see below), whose sum is σ = 129669120. Its totient is φ = 56598080.

The previous prime is 90977801. The next prime is 90977819. The reversal of 90977811 is 11877909.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 90977811 - 2¹¹ = 90975763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90977819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13251 + ... + 18908.

It is an arithmetic number, because the mean of its divisors is an integer number (8104320).

Almost surely, 2^90977811 is an apocalyptic number.

90977811 is a deficient number, since it is larger than the sum of its proper divisors (38691309).

90977811 is a wasteful number, since it uses less digits than its factorization.

90977811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32226.

The product of its (nonzero) digits is 31752, while the sum is 42.

The square root of 90977811 is about 9538.2289236524. The cubic root of 90977811 is about 449.7575830126.

It can be divided in two parts, 90 and 977811, that added together give a triangular number (977901 = T₁₃₉₈).

The spelling of 90977811 in words is "ninety million, nine hundred seventy-seven thousand, eight hundred eleven".