1397403919 has 2 divisors, whose sum is σ = 1397403920. Its totient is φ = 1397403918.

The previous prime is 1397403877. The next prime is 1397403923. The reversal of 1397403919 is 9193047931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1397403919 - 2¹¹ = 1397401871 is a prime.

It is a super-2 number, since 2×1397403919² = 3905475425673117122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1397403929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698701959 + 698701960.

It is an arithmetic number, because the mean of its divisors is an integer number (698701960).

Almost surely, 2^1397403919 is an apocalyptic number.

1397403919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397403919 is an equidigital number, since it uses as much as digits as its factorization.

1397403919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 1397403919 is about 37381.8661786701. The cubic root of 1397403919 is about 1117.9970363453.

The spelling of 1397403919 in words is "one billion, three hundred ninety-seven million, four hundred three thousand, nine hundred nineteen".