22978829 has 2 divisors, whose sum is σ = 22978830. Its totient is φ = 22978828.

The previous prime is 22978811. The next prime is 22978831. The reversal of 22978829 is 92887922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12075625 + 10903204 = 3475^2 + 3302^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22978829 is a prime.

It is a super-2 number, since 2×22978829² = 1056053164422482, which contains 22 as substring.

Together with 22978831, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22971829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11489414 + 11489415.

It is an arithmetic number, because the mean of its divisors is an integer number (11489415).

Almost surely, 2^22978829 is an apocalyptic number.

It is an amenable number.

22978829 is a deficient number, since it is larger than the sum of its proper divisors (1).

22978829 is an equidigital number, since it uses as much as digits as its factorization.

22978829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 47.

The square root of 22978829 is about 4793.6237858222. The cubic root of 22978829 is about 284.2994139409.

The spelling of 22978829 in words is "twenty-two million, nine hundred seventy-eight thousand, eight hundred twenty-nine".