1399888037 has 2 divisors, whose sum is σ = 1399888038. Its totient is φ = 1399888036.

The previous prime is 1399888027. The next prime is 1399888067. The reversal of 1399888037 is 7308889931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1166837281 + 233050756 = 34159^2 + 15266^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399888037 - 2¹² = 1399883941 is a prime.

It is a super-2 number, since 2×1399888037² = 3919373032271426738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1399888027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699944018 + 699944019.

It is an arithmetic number, because the mean of its divisors is an integer number (699944019).

Almost surely, 2^1399888037 is an apocalyptic number.

It is an amenable number.

1399888037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399888037 is an equidigital number, since it uses as much as digits as its factorization.

1399888037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The square root of 1399888037 is about 37415.0776693033. The cubic root of 1399888037 is about 1118.6591194364.

The spelling of 1399888037 in words is "one billion, three hundred ninety-nine million, eight hundred eighty-eight thousand, thirty-seven".