39630191 has 2 divisors, whose sum is σ = 39630192. Its totient is φ = 39630190.

The previous prime is 39630137. The next prime is 39630193. The reversal of 39630191 is 19103693.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39630191 - 2¹⁴ = 39613807 is a prime.

Together with 39630193, 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 (39630193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19815095 + 19815096.

It is an arithmetic number, because the mean of its divisors is an integer number (19815096).

Almost surely, 2^39630191 is an apocalyptic number.

39630191 is a deficient number, since it is larger than the sum of its proper divisors (1).

39630191 is an equidigital number, since it uses as much as digits as its factorization.

39630191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 39630191 is about 6295.2514643976. The cubic root of 39630191 is about 340.9379837513.

The spelling of 39630191 in words is "thirty-nine million, six hundred thirty thousand, one hundred ninety-one".