1406312639 has 2 divisors, whose sum is σ = 1406312640. Its totient is φ = 1406312638.

The previous prime is 1406312629. The next prime is 1406312681. The reversal of 1406312639 is 9362136041.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1406312639 - 2²⁴ = 1389535423 is a prime.

It is a super-2 number, since 2×1406312639² = 3955430477222288642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1406312599 and 1406312608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1406312629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703156319 + 703156320.

It is an arithmetic number, because the mean of its divisors is an integer number (703156320).

Almost surely, 2^1406312639 is an apocalyptic number.

1406312639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406312639 is an equidigital number, since it uses as much as digits as its factorization.

1406312639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 1406312639 is about 37500.8351773664. The cubic root of 1406312639 is about 1120.3678211012.

The spelling of 1406312639 in words is "one billion, four hundred six million, three hundred twelve thousand, six hundred thirty-nine".