1408972813 has 4 divisors (see below), whose sum is σ = 1409160348. Its totient is φ = 1408785280.

The previous prime is 1408972729. The next prime is 1408972819. The reversal of 1408972813 is 3182798041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3182798041 = 2711 ⋅1174031.

It can be written as a sum of positive squares in 2 ways, for example, as 368716804 + 1040256009 = 19202^2 + 32253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1408972813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1408972813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1408972819) 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 in 3 ways as a sum of consecutive naturals, for example, 82006 + ... + 97687.

It is an arithmetic number, because the mean of its divisors is an integer number (352290087).

Almost surely, 2^1408972813 is an apocalyptic number.

It is an amenable number.

1408972813 is a deficient number, since it is larger than the sum of its proper divisors (187535).

1408972813 is an equidigital number, since it uses as much as digits as its factorization.

1408972813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187534.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 1408972813 is about 37536.2866170856. The cubic root of 1408972813 is about 1121.0738035449.

The spelling of 1408972813 in words is "one billion, four hundred eight million, nine hundred seventy-two thousand, eight hundred thirteen".