31301019977 has 2 divisors, whose sum is σ = 31301019978. Its totient is φ = 31301019976.

The previous prime is 31301019949. The next prime is 31301020039. The reversal of 31301019977 is 77991010313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24292651321 + 7008368656 = 155861^2 + 83716^2 .

It is a cyclic number.

It is not a de Polignac number, because 31301019977 - 2¹⁴ = 31301003593 is a prime.

It is not a weakly prime, because it can be changed into another prime (31301019077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15650509988 + 15650509989.

It is an arithmetic number, because the mean of its divisors is an integer number (15650509989).

Almost surely, 2^31301019977 is an apocalyptic number.

It is an amenable number.

31301019977 is a deficient number, since it is larger than the sum of its proper divisors (1).

31301019977 is an equidigital number, since it uses as much as digits as its factorization.

31301019977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35721, while the sum is 41.

The spelling of 31301019977 in words is "thirty-one billion, three hundred one million, nineteen thousand, nine hundred seventy-seven".