39421631 has 2 divisors, whose sum is σ = 39421632. Its totient is φ = 39421630.

The previous prime is 39421621. The next prime is 39421639. The reversal of 39421631 is 13612493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39421631 - 2⁶ = 39421567 is a prime.

It is a super-2 number, since 2×39421631² = 3108129981400322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 39421594 and 39421603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39421639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19710815 + 19710816.

It is an arithmetic number, because the mean of its divisors is an integer number (19710816).

Almost surely, 2^39421631 is an apocalyptic number.

39421631 is a deficient number, since it is larger than the sum of its proper divisors (1).

39421631 is an equidigital number, since it uses as much as digits as its factorization.

39421631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 39421631 is about 6278.6647465843. The cubic root of 39421631 is about 340.3388519148.

The spelling of 39421631 in words is "thirty-nine million, four hundred twenty-one thousand, six hundred thirty-one".