23758421 has 2 divisors, whose sum is σ = 23758422. Its totient is φ = 23758420.

The previous prime is 23758351. The next prime is 23758429. The reversal of 23758421 is 12485732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15319396 + 8439025 = 3914^2 + 2905^2 .

It is a cyclic number.

It is not a de Polignac number, because 23758421 - 2²² = 19564117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23758429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11879210 + 11879211.

It is an arithmetic number, because the mean of its divisors is an integer number (11879211).

Almost surely, 2^23758421 is an apocalyptic number.

It is an amenable number.

23758421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23758421 is an equidigital number, since it uses as much as digits as its factorization.

23758421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

The square root of 23758421 is about 4874.2610722037. The cubic root of 23758421 is about 287.4788228888.

The spelling of 23758421 in words is "twenty-three million, seven hundred fifty-eight thousand, four hundred twenty-one".