22896991 has 4 divisors (see below), whose sum is σ = 24658312. Its totient is φ = 21135672.

The previous prime is 22896989. The next prime is 22896997. The reversal of 22896991 is 19969822.

22896991 = 1951² + 1952² + ... + 1956².

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

It is a cyclic number.

It is not a de Polignac number, because 22896991 - 2¹ = 22896989 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 (22896997) 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, 880641 + ... + 880666.

It is an arithmetic number, because the mean of its divisors is an integer number (6164578).

Almost surely, 2^22896991 is an apocalyptic number.

22896991 is a deficient number, since it is larger than the sum of its proper divisors (1761321).

22896991 is a wasteful number, since it uses less digits than its factorization.

22896991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761320.

The product of its digits is 139968, while the sum is 46.

The square root of 22896991 is about 4785.0800411278. The cubic root of 22896991 is about 283.9615062223.

The spelling of 22896991 in words is "twenty-two million, eight hundred ninety-six thousand, nine hundred ninety-one".