22921097 has 4 divisors (see below), whose sum is σ = 22999620. Its totient is φ = 22842576.

The previous prime is 22921081. The next prime is 22921103. The reversal of 22921097 is 79012922.

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 19749136 + 3171961 = 4444^2 + 1781^2 .

It is a cyclic number.

It is not a de Polignac number, because 22921097 - 2⁴ = 22921081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22921037) 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, 38822 + ... + 39407.

It is an arithmetic number, because the mean of its divisors is an integer number (5749905).

Almost surely, 2^22921097 is an apocalyptic number.

It is an amenable number.

22921097 is a deficient number, since it is larger than the sum of its proper divisors (78523).

22921097 is an equidigital number, since it uses as much as digits as its factorization.

22921097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78522.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 22921097 is about 4787.5982496446. The cubic root of 22921097 is about 284.0611230273.

The spelling of 22921097 in words is "twenty-two million, nine hundred twenty-one thousand, ninety-seven".