22779913 has 16 divisors (see below), whose sum is σ = 26159616. Its totient is φ = 19673280.

The previous prime is 22779907. The next prime is 22779919. The reversal of 22779913 is 31997722.

It is the 1949-th star number.

It is an interprime number because it is at equal distance from previous prime (22779907) and next prime (22779919).

It is not a de Polignac number, because 22779913 - 2¹⁷ = 22648841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22779919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13243 + ... + 14863.

It is an arithmetic number, because the mean of its divisors is an integer number (1634976).

Almost surely, 2^22779913 is an apocalyptic number.

22779913 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

22779913 is a deficient number, since it is larger than the sum of its proper divisors (3379703).

22779913 is a wasteful number, since it uses less digits than its factorization.

22779913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704.

The product of its digits is 47628, while the sum is 40.

The square root of 22779913 is about 4772.8307114332. The cubic root of 22779913 is about 283.4766903913.

The spelling of 22779913 in words is "twenty-two million, seven hundred seventy-nine thousand, nine hundred thirteen".