30979493 has 2 divisors, whose sum is σ = 30979494. Its totient is φ = 30979492.

The previous prime is 30979489. The next prime is 30979499. The reversal of 30979493 is 39497903.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27227524 + 3751969 = 5218^2 + 1937^2 .

It is a cyclic number.

It is not a de Polignac number, because 30979493 - 2² = 30979489 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30979499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15489746 + 15489747.

It is an arithmetic number, because the mean of its divisors is an integer number (15489747).

Almost surely, 2^30979493 is an apocalyptic number.

It is an amenable number.

30979493 is a deficient number, since it is larger than the sum of its proper divisors (1).

30979493 is an equidigital number, since it uses as much as digits as its factorization.

30979493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 30979493 is about 5565.9224752057. The cubic root of 30979493 is about 314.0687808270.

The spelling of 30979493 in words is "thirty million, nine hundred seventy-nine thousand, four hundred ninety-three".