22972387 has 4 divisors (see below), whose sum is σ = 24181480. Its totient is φ = 21763296.

The previous prime is 22972381. The next prime is 22972403. The reversal of 22972387 is 78327922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78327922 = 2 ⋅39163961.

It is a cyclic number.

It is not a de Polignac number, because 22972387 - 2¹⁹ = 22448099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22972381) 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, 604518 + ... + 604555.

It is an arithmetic number, because the mean of its divisors is an integer number (6045370).

Almost surely, 2^22972387 is an apocalyptic number.

22972387 is a deficient number, since it is larger than the sum of its proper divisors (1209093).

22972387 is a wasteful number, since it uses less digits than its factorization.

22972387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209092.

The product of its digits is 84672, while the sum is 40.

The square root of 22972387 is about 4792.9518044729. The cubic root of 22972387 is about 284.2728441507.

The spelling of 22972387 in words is "twenty-two million, nine hundred seventy-two thousand, three hundred eighty-seven".