1400664647 has 2 divisors, whose sum is σ = 1400664648. Its totient is φ = 1400664646.

The previous prime is 1400664619. The next prime is 1400664679. The reversal of 1400664647 is 7464660041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1400664647 - 2⁶ = 1400664583 is a prime.

It is a super-2 number, since 2×1400664647² = 3923722906711269218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1400664647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400664607) 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, 700332323 + 700332324.

It is an arithmetic number, because the mean of its divisors is an integer number (700332324).

Almost surely, 2^1400664647 is an apocalyptic number.

1400664647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400664647 is an equidigital number, since it uses as much as digits as its factorization.

1400664647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 1400664647 is about 37425.4545329780. The cubic root of 1400664647 is about 1118.8659457997.

The spelling of 1400664647 in words is "one billion, four hundred million, six hundred sixty-four thousand, six hundred forty-seven".