39630971 has 2 divisors, whose sum is σ = 39630972. Its totient is φ = 39630970.

The previous prime is 39630919. The next prime is 39630991. The reversal of 39630971 is 17903693.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39630971 is a prime.

It is a super-2 number, since 2×39630971² = 3141227724805682, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39630901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19815485 + 19815486.

It is an arithmetic number, because the mean of its divisors is an integer number (19815486).

Almost surely, 2^39630971 is an apocalyptic number.

39630971 is a deficient number, since it is larger than the sum of its proper divisors (1).

39630971 is an equidigital number, since it uses as much as digits as its factorization.

39630971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 39630971 is about 6295.3134155497. The cubic root of 39630971 is about 340.9402205131.

The spelling of 39630971 in words is "thirty-nine million, six hundred thirty thousand, nine hundred seventy-one".