90274979 has 2 divisors, whose sum is σ = 90274980. Its totient is φ = 90274978.

The previous prime is 90274969. The next prime is 90274991. The reversal of 90274979 is 97947209.

It is a weak prime.

It is an emirp because it is prime and its reverse (97947209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90274979 - 2⁴ = 90274963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90274969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45137489 + 45137490.

It is an arithmetic number, because the mean of its divisors is an integer number (45137490).

Almost surely, 2^90274979 is an apocalyptic number.

90274979 is a deficient number, since it is larger than the sum of its proper divisors (1).

90274979 is an equidigital number, since it uses as much as digits as its factorization.

90274979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 90274979 is about 9501.3145932550. The cubic root of 90274979 is about 448.5964151391.

The spelling of 90274979 in words is "ninety million, two hundred seventy-four thousand, nine hundred seventy-nine".