2391061972 has 18 divisors (see below), whose sum is σ = 4506896814. Its totient is φ = 1103404320.

The previous prime is 2391061909. The next prime is 2391061987. The reversal of 2391061972 is 2791601932.

It can be written as a sum of positive squares in 3 ways, for example, as 41139396 + 2349922576 = 6414^2 + 48476^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 349222 + ... + 356002.

Almost surely, 2^2391061972 is an apocalyptic number.

It is an amenable number.

2391061972 is a deficient number, since it is larger than the sum of its proper divisors (2115834842).

2391061972 is an frugal number, since it uses more digits than its factorization.

2391061972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13579 (or 6796 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 2391061972 is about 48898.4863978426. The cubic root of 2391061972 is about 1337.2017741586.

The spelling of 2391061972 in words is "two billion, three hundred ninety-one million, sixty-one thousand, nine hundred seventy-two".