2972249621 has 8 divisors (see below), whose sum is σ = 3433186944. Its totient is φ = 2543101120.

The previous prime is 2972249597. The next prime is 2972249633. The reversal of 2972249621 is 1269422792.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2972249621 - 2¹⁸ = 2971987477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2972249921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7947005 + ... + 7947378.

It is an arithmetic number, because the mean of its divisors is an integer number (429148368).

Almost surely, 2^2972249621 is an apocalyptic number.

It is an amenable number.

2972249621 is a deficient number, since it is larger than the sum of its proper divisors (460937323).

2972249621 is a wasteful number, since it uses less digits than its factorization.

2972249621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15894411.

The product of its digits is 217728, while the sum is 44.

The square root of 2972249621 is about 54518.3420602645. The cubic root of 2972249621 is about 1437.7887907348.

The spelling of 2972249621 in words is "two billion, nine hundred seventy-two million, two hundred forty-nine thousand, six hundred twenty-one".