22770389 has 2 divisors, whose sum is σ = 22770390. Its totient is φ = 22770388.

The previous prime is 22770353. The next prime is 22770409. The reversal of 22770389 is 98307722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11847364 + 10923025 = 3442^2 + 3305^2 .

It is a cyclic number.

It is not a de Polignac number, because 22770389 - 2²⁰ = 21721813 is a prime.

It is a super-2 number, since 2×22770389² = 1036981230422642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22770589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11385194 + 11385195.

It is an arithmetic number, because the mean of its divisors is an integer number (11385195).

Almost surely, 2^22770389 is an apocalyptic number.

It is an amenable number.

22770389 is a deficient number, since it is larger than the sum of its proper divisors (1).

22770389 is an equidigital number, since it uses as much as digits as its factorization.

22770389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 22770389 is about 4771.8328763694. The cubic root of 22770389 is about 283.4371788511.

The spelling of 22770389 in words is "twenty-two million, seven hundred seventy thousand, three hundred eighty-nine".