1372906993 has 4 divisors (see below), whose sum is σ = 1385502580. Its totient is φ = 1360311408.

The previous prime is 1372906991. The next prime is 1372907021. The reversal of 1372906993 is 3996092731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 839666529 + 533240464 = 28977^2 + 23092^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372906993 - 2¹ = 1372906991 is a prime.

It is a super-2 number, since 2×1372906993² = 3769747222856604098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1372906991) 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, 6297630 + ... + 6297847.

It is an arithmetic number, because the mean of its divisors is an integer number (346375645).

Almost surely, 2^1372906993 is an apocalyptic number.

It is an amenable number.

1372906993 is a deficient number, since it is larger than the sum of its proper divisors (12595587).

1372906993 is a wasteful number, since it uses less digits than its factorization.

1372906993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12595586.

The product of its (nonzero) digits is 551124, while the sum is 49.

The square root of 1372906993 is about 37052.7595868378. The cubic root of 1372906993 is about 1111.4255398635.

The spelling of 1372906993 in words is "one billion, three hundred seventy-two million, nine hundred six thousand, nine hundred ninety-three".