90877939 has 2 divisors, whose sum is σ = 90877940. Its totient is φ = 90877938.

The previous prime is 90877889. The next prime is 90877949. The reversal of 90877939 is 93977809.

It is a strong prime.

It is an emirp because it is prime and its reverse (93977809) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90877939 - 2¹¹ = 90875891 is a prime.

It is not a weakly prime, because it can be changed into another prime (90877949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45438969 + 45438970.

It is an arithmetic number, because the mean of its divisors is an integer number (45438970).

Almost surely, 2^90877939 is an apocalyptic number.

90877939 is a deficient number, since it is larger than the sum of its proper divisors (1).

90877939 is an equidigital number, since it uses as much as digits as its factorization.

90877939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 90877939 is about 9532.9921325888. The cubic root of 90877939 is about 449.5929471328.

The spelling of 90877939 in words is "ninety million, eight hundred seventy-seven thousand, nine hundred thirty-nine".