1386669631 has 2 divisors, whose sum is σ = 1386669632. Its totient is φ = 1386669630.

The previous prime is 1386669601. The next prime is 1386669643. The reversal of 1386669631 is 1369666831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1386669631 - 2²¹ = 1384572479 is a prime.

It is a super-2 number, since 2×1386669631² = 3845705331075352322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1386669601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693334815 + 693334816.

It is an arithmetic number, because the mean of its divisors is an integer number (693334816).

Almost surely, 2^1386669631 is an apocalyptic number.

1386669631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386669631 is an equidigital number, since it uses as much as digits as its factorization.

1386669631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 49.

The square root of 1386669631 is about 37238.0132525891. The cubic root of 1386669631 is about 1115.1270089321.

The spelling of 1386669631 in words is "one billion, three hundred eighty-six million, six hundred sixty-nine thousand, six hundred thirty-one".