23078257 has 2 divisors, whose sum is σ = 23078258. Its totient is φ = 23078256.

The previous prime is 23078239. The next prime is 23078273. The reversal of 23078257 is 75287032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20286016 + 2792241 = 4504^2 + 1671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23078257 is a prime.

It is equal to p_1452895 and since 23078257 and 1452895 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (23078207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11539128 + 11539129.

It is an arithmetic number, because the mean of its divisors is an integer number (11539129).

Almost surely, 2^23078257 is an apocalyptic number.

It is an amenable number.

23078257 is a deficient number, since it is larger than the sum of its proper divisors (1).

23078257 is an equidigital number, since it uses as much as digits as its factorization.

23078257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 23078257 is about 4803.9834512621. The cubic root of 23078257 is about 284.7088727160.

It can be divided in two parts, 230 and 78257, that added together give a palindrome (78487).

The spelling of 23078257 in words is "twenty-three million, seventy-eight thousand, two hundred fifty-seven".