23475421 has 2 divisors, whose sum is σ = 23475422. Its totient is φ = 23475420.

The previous prime is 23475407. The next prime is 23475457. The reversal of 23475421 is 12457432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12152196 + 11323225 = 3486^2 + 3365^2 .

It is a cyclic number.

It is not a de Polignac number, because 23475421 - 2¹³ = 23467229 is a prime.

It is a super-2 number, since 2×23475421² = 1102190782254482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23475421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23475461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11737710 + 11737711.

It is an arithmetic number, because the mean of its divisors is an integer number (11737711).

Almost surely, 2^23475421 is an apocalyptic number.

It is an amenable number.

23475421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23475421 is an equidigital number, since it uses as much as digits as its factorization.

23475421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 28.

The square root of 23475421 is about 4845.1440639056. The cubic root of 23475421 is about 286.3328195489.

The spelling of 23475421 in words is "twenty-three million, four hundred seventy-five thousand, four hundred twenty-one".