22991903 has 4 divisors (see below), whose sum is σ = 25082088. Its totient is φ = 20901720.

The previous prime is 22991869. The next prime is 22991909. The reversal of 22991903 is 30919922.

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 22991903 - 2¹⁶ = 22926367 is a prime.

It is a super-2 number, since 2×22991903² = 1057255207122818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22991909) 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, 1045076 + ... + 1045097.

It is an arithmetic number, because the mean of its divisors is an integer number (6270522).

Almost surely, 2^22991903 is an apocalyptic number.

22991903 is a deficient number, since it is larger than the sum of its proper divisors (2090185).

22991903 is a wasteful number, since it uses less digits than its factorization.

22991903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090184.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 22991903 is about 4794.9872783981. The cubic root of 22991903 is about 284.3533219075.

The spelling of 22991903 in words is "twenty-two million, nine hundred ninety-one thousand, nine hundred three".