1200972613 has 4 divisors (see below), whose sum is σ = 1201096620. Its totient is φ = 1200848608.

The previous prime is 1200972593. The next prime is 1200972659. The reversal of 1200972613 is 3162790021.

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 186104164 + 1014868449 = 13642^2 + 31857^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200972613 - 2¹³ = 1200964421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200972673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46120 + ... + 67297.

It is an arithmetic number, because the mean of its divisors is an integer number (300274155).

Almost surely, 2^1200972613 is an apocalyptic number.

It is an amenable number.

1200972613 is a deficient number, since it is larger than the sum of its proper divisors (124007).

1200972613 is a wasteful number, since it uses less digits than its factorization.

1200972613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124006.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1200972613 is about 34655.0517673831. The cubic root of 1200972613 is about 1062.9455904128.

The spelling of 1200972613 in words is "one billion, two hundred million, nine hundred seventy-two thousand, six hundred thirteen".