23772109 has 2 divisors, whose sum is σ = 23772110. Its totient is φ = 23772108.

The previous prime is 23772101. The next prime is 23772131. The reversal of 23772109 is 90127732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22610025 + 1162084 = 4755^2 + 1078^2 .

It is a cyclic number.

It is not a de Polignac number, because 23772109 - 2³ = 23772101 is a prime.

It is a super-2 number, since 2×23772109² = 1130226332615762, which contains 22 as substring.

It is equal to p_1493707 and since 23772109 and 1493707 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23772101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11886054 + 11886055.

It is an arithmetic number, because the mean of its divisors is an integer number (11886055).

Almost surely, 2^23772109 is an apocalyptic number.

It is an amenable number.

23772109 is a deficient number, since it is larger than the sum of its proper divisors (1).

23772109 is an equidigital number, since it uses as much as digits as its factorization.

23772109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 23772109 is about 4875.6649802873. The cubic root of 23772109 is about 287.5340209268.

The spelling of 23772109 in words is "twenty-three million, seven hundred seventy-two thousand, one hundred nine".