1371520687 has 2 divisors, whose sum is σ = 1371520688. Its totient is φ = 1371520686.

The previous prime is 1371520649. The next prime is 1371520721. The reversal of 1371520687 is 7860251731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1371520687 - 2²³ = 1363132079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1371521687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685760343 + 685760344.

It is an arithmetic number, because the mean of its divisors is an integer number (685760344).

Almost surely, 2^1371520687 is an apocalyptic number.

1371520687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1371520687 is an equidigital number, since it uses as much as digits as its factorization.

1371520687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 1371520687 is about 37034.0476723785. The cubic root of 1371520687 is about 1111.0513230136.

The spelling of 1371520687 in words is "one billion, three hundred seventy-one million, five hundred twenty thousand, six hundred eighty-seven".