1315719877 has 2 divisors, whose sum is σ = 1315719878. Its totient is φ = 1315719876.

The previous prime is 1315719767. The next prime is 1315719893. The reversal of 1315719877 is 7789175131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1304220996 + 11498881 = 36114^2 + 3391^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315719877 - 2¹⁹ = 1315195589 is a prime.

It is a super-2 number, since 2×1315719877² = 3462237589465790258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1315719877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315419877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657859938 + 657859939.

It is an arithmetic number, because the mean of its divisors is an integer number (657859939).

Almost surely, 2^1315719877 is an apocalyptic number.

It is an amenable number.

1315719877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315719877 is an equidigital number, since it uses as much as digits as its factorization.

1315719877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 370440, while the sum is 49.

The square root of 1315719877 is about 36272.8531687266. The cubic root of 1315719877 is about 1095.7743879673.

The spelling of 1315719877 in words is "one billion, three hundred fifteen million, seven hundred nineteen thousand, eight hundred seventy-seven".