1400688631 has 2 divisors, whose sum is σ = 1400688632. Its totient is φ = 1400688630.

The previous prime is 1400688623. The next prime is 1400688637. The reversal of 1400688631 is 1368860041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1400688631 - 2³ = 1400688623 is a prime.

It is a super-2 number, since 2×1400688631² = 3923857282025308322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400688637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700344315 + 700344316.

It is an arithmetic number, because the mean of its divisors is an integer number (700344316).

Almost surely, 2^1400688631 is an apocalyptic number.

1400688631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400688631 is an equidigital number, since it uses as much as digits as its factorization.

1400688631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 1400688631 is about 37425.7749552364. The cubic root of 1400688631 is about 1118.8723319887.

The spelling of 1400688631 in words is "one billion, four hundred million, six hundred eighty-eight thousand, six hundred thirty-one".