1497117877 has 2 divisors, whose sum is σ = 1497117878. Its totient is φ = 1497117876.

The previous prime is 1497117823. The next prime is 1497117889. The reversal of 1497117877 is 7787117941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1394723716 + 102394161 = 37346^2 + 10119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1497117877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1497117277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 748558938 + 748558939.

It is an arithmetic number, because the mean of its divisors is an integer number (748558939).

Almost surely, 2^1497117877 is an apocalyptic number.

It is an amenable number.

1497117877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1497117877 is an equidigital number, since it uses as much as digits as its factorization.

1497117877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691488, while the sum is 52.

The square root of 1497117877 is about 38692.6075239186. The cubic root of 1497117877 is about 1143.9806153190.

The spelling of 1497117877 in words is "one billion, four hundred ninety-seven million, one hundred seventeen thousand, eight hundred seventy-seven".