38632421 has 2 divisors, whose sum is σ = 38632422. Its totient is φ = 38632420.

The previous prime is 38632411. The next prime is 38632423. The reversal of 38632421 is 12423683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34281025 + 4351396 = 5855^2 + 2086^2 .

It is a cyclic number.

It is not a de Polignac number, because 38632421 - 2⁶ = 38632357 is a prime.

Together with 38632423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38632423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19316210 + 19316211.

It is an arithmetic number, because the mean of its divisors is an integer number (19316211).

Almost surely, 2^38632421 is an apocalyptic number.

It is an amenable number.

38632421 is a deficient number, since it is larger than the sum of its proper divisors (1).

38632421 is an equidigital number, since it uses as much as digits as its factorization.

38632421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 38632421 is about 6215.4984514518. The cubic root of 38632421 is about 338.0523622529.

The spelling of 38632421 in words is "thirty-eight million, six hundred thirty-two thousand, four hundred twenty-one".