1372748857 has 2 divisors, whose sum is σ = 1372748858. Its totient is φ = 1372748856.

The previous prime is 1372748837. The next prime is 1372748891. The reversal of 1372748857 is 7588472731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1318343481 + 54405376 = 36309^2 + 7376^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372748857 - 2¹⁵ = 1372716089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1372748807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686374428 + 686374429.

It is an arithmetic number, because the mean of its divisors is an integer number (686374429).

Almost surely, 2^1372748857 is an apocalyptic number.

It is an amenable number.

1372748857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372748857 is an equidigital number, since it uses as much as digits as its factorization.

1372748857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2634240, while the sum is 52.

The square root of 1372748857 is about 37050.6255952582. The cubic root of 1372748857 is about 1111.3828656598.

The spelling of 1372748857 in words is "one billion, three hundred seventy-two million, seven hundred forty-eight thousand, eight hundred fifty-seven".