30975493897 has 2 divisors, whose sum is σ = 30975493898. Its totient is φ = 30975493896.

The previous prime is 30975493859. The next prime is 30975493921. The reversal of 30975493897 is 79839457903.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20444424256 + 10531069641 = 142984^2 + 102621^2 .

It is a cyclic number.

It is not a de Polignac number, because 30975493897 - 2¹⁵ = 30975461129 is a prime.

It is not a weakly prime, because it can be changed into another prime (30975493817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15487746948 + 15487746949.

It is an arithmetic number, because the mean of its divisors is an integer number (15487746949).

Almost surely, 2^30975493897 is an apocalyptic number.

It is an amenable number.

30975493897 is a deficient number, since it is larger than the sum of its proper divisors (1).

30975493897 is an equidigital number, since it uses as much as digits as its factorization.

30975493897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51438240, while the sum is 64.

It can be divided in two parts, 309754 and 93897, that added together give a triangular number (403651 = T₈₉₈).

The spelling of 30975493897 in words is "thirty billion, nine hundred seventy-five million, four hundred ninety-three thousand, eight hundred ninety-seven".