1395909631 has 2 divisors, whose sum is σ = 1395909632. Its totient is φ = 1395909630.

The previous prime is 1395909623. The next prime is 1395909649. The reversal of 1395909631 is 1369095931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1395909631 - 2³ = 1395909623 is a prime.

It is a super-2 number, since 2×1395909631² = 3897127395837112322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1395909131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697954815 + 697954816.

It is an arithmetic number, because the mean of its divisors is an integer number (697954816).

Almost surely, 2^1395909631 is an apocalyptic number.

1395909631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1395909631 is an equidigital number, since it uses as much as digits as its factorization.

1395909631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196830, while the sum is 46.

The square root of 1395909631 is about 37361.8740295505. The cubic root of 1395909631 is about 1117.5983910753.

The spelling of 1395909631 in words is "one billion, three hundred ninety-five million, nine hundred nine thousand, six hundred thirty-one".