30312312977 has 2 divisors, whose sum is σ = 30312312978. Its totient is φ = 30312312976.

The previous prime is 30312312911. The next prime is 30312313037. The reversal of 30312312977 is 77921321303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16996076161 + 13316236816 = 130369^2 + 115396^2 .

It is a cyclic number.

It is not a de Polignac number, because 30312312977 - 2¹⁴ = 30312296593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30312312977.

It is not a weakly prime, because it can be changed into another prime (30312312907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15156156488 + 15156156489.

It is an arithmetic number, because the mean of its divisors is an integer number (15156156489).

Almost surely, 2^30312312977 is an apocalyptic number.

It is an amenable number.

30312312977 is a deficient number, since it is larger than the sum of its proper divisors (1).

30312312977 is an equidigital number, since it uses as much as digits as its factorization.

30312312977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 38.

The spelling of 30312312977 in words is "thirty billion, three hundred twelve million, three hundred twelve thousand, nine hundred seventy-seven".