1975977321347 has 2 divisors, whose sum is σ = 1975977321348. Its totient is φ = 1975977321346.

The previous prime is 1975977321247. The next prime is 1975977321379. The reversal of 1975977321347 is 7431237795791.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1975977321347 is a prime.

It is not a weakly prime, because it can be changed into another prime (1975977321397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987988660673 + 987988660674.

It is an arithmetic number, because the mean of its divisors is an integer number (987988660674).

Almost surely, 2^{1975977321347} is an apocalyptic number.

1975977321347 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975977321347 is an equidigital number, since it uses as much as digits as its factorization.

1975977321347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70013160, while the sum is 65.

The spelling of 1975977321347 in words is "one trillion, nine hundred seventy-five billion, nine hundred seventy-seven million, three hundred twenty-one thousand, three hundred forty-seven".