90877949 has 2 divisors, whose sum is σ = 90877950. Its totient is φ = 90877948.

The previous prime is 90877939. The next prime is 90877973. The reversal of 90877949 is 94977809.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78676900 + 12201049 = 8870^2 + 3493^2 .

It is a cyclic number.

It is not a de Polignac number, because 90877949 - 2²⁰ = 89829373 is a prime.

It is a super-2 number, since 2×90877949² = 16517603228893202, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90877949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90877939) 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 as a sum of consecutive naturals, namely, 45438974 + 45438975.

It is an arithmetic number, because the mean of its divisors is an integer number (45438975).

Almost surely, 2^90877949 is an apocalyptic number.

It is an amenable number.

90877949 is a deficient number, since it is larger than the sum of its proper divisors (1).

90877949 is an equidigital number, since it uses as much as digits as its factorization.

90877949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 90877949 is about 9532.9926570831. The cubic root of 90877949 is about 449.5929636236.

The spelling of 90877949 in words is "ninety million, eight hundred seventy-seven thousand, nine hundred forty-nine".