1375547917 has 2 divisors, whose sum is σ = 1375547918. Its totient is φ = 1375547916.

The previous prime is 1375547897. The next prime is 1375547933. The reversal of 1375547917 is 7197455731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1277419081 + 98128836 = 35741^2 + 9906^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1375547917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1375547317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687773958 + 687773959.

It is an arithmetic number, because the mean of its divisors is an integer number (687773959).

Almost surely, 2^1375547917 is an apocalyptic number.

It is an amenable number.

1375547917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375547917 is an equidigital number, since it uses as much as digits as its factorization.

1375547917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 926100, while the sum is 49.

The square root of 1375547917 is about 37088.3798109327. The cubic root of 1375547917 is about 1112.1377294878.

The spelling of 1375547917 in words is "one billion, three hundred seventy-five million, five hundred forty-seven thousand, nine hundred seventeen".