39627989 has 2 divisors, whose sum is σ = 39627990. Its totient is φ = 39627988.

The previous prime is 39627967. The next prime is 39628009. The reversal of 39627989 is 98972693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34128964 + 5499025 = 5842^2 + 2345^2 .

It is an emirp because it is prime and its reverse (98972693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39627989 - 2⁸ = 39627733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39627989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39627089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19813994 + 19813995.

It is an arithmetic number, because the mean of its divisors is an integer number (19813995).

Almost surely, 2^39627989 is an apocalyptic number.

It is an amenable number.

39627989 is a deficient number, since it is larger than the sum of its proper divisors (1).

39627989 is an equidigital number, since it uses as much as digits as its factorization.

39627989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 53.

The square root of 39627989 is about 6295.0765682397. The cubic root of 39627989 is about 340.9316690425.

The spelling of 39627989 in words is "thirty-nine million, six hundred twenty-seven thousand, nine hundred eighty-nine".