39901231 has 2 divisors, whose sum is σ = 39901232. Its totient is φ = 39901230.

The previous prime is 39901177. The next prime is 39901243. The reversal of 39901231 is 13210993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39901231 - 2⁹ = 39900719 is a prime.

It is a super-2 number, since 2×39901231² = 3184216470630722, which contains 22 as substring.

It is equal to p_2428048 and since 39901231 and 2428048 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39901231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39901271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19950615 + 19950616.

It is an arithmetic number, because the mean of its divisors is an integer number (19950616).

Almost surely, 2^39901231 is an apocalyptic number.

39901231 is a deficient number, since it is larger than the sum of its proper divisors (1).

39901231 is an equidigital number, since it uses as much as digits as its factorization.

39901231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 39901231 is about 6316.7421191624. The cubic root of 39901231 is about 341.7134696410.

The spelling of 39901231 in words is "thirty-nine million, nine hundred one thousand, two hundred thirty-one".