1406656631 has 2 divisors, whose sum is σ = 1406656632. Its totient is φ = 1406656630.

The previous prime is 1406656607. The next prime is 1406656703. The reversal of 1406656631 is 1366566041.

It is a weak prime.

It is an emirp because it is prime and its reverse (1366566041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1406656631 - 2¹⁴ = 1406640247 is a prime.

It is a super-2 number, since 2×1406656631² = 3957365755072540322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1406656831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703328315 + 703328316.

It is an arithmetic number, because the mean of its divisors is an integer number (703328316).

Almost surely, 2^1406656631 is an apocalyptic number.

1406656631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406656631 is an equidigital number, since it uses as much as digits as its factorization.

1406656631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 1406656631 is about 37505.4213547855. The cubic root of 1406656631 is about 1120.4591630825.

The spelling of 1406656631 in words is "one billion, four hundred six million, six hundred fifty-six thousand, six hundred thirty-one".