39396989 has 2 divisors, whose sum is σ = 39396990. Its totient is φ = 39396988.

The previous prime is 39396961. The next prime is 39397009. The reversal of 39396989 is 98969393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28440889 + 10956100 = 5333^2 + 3310^2 .

It is a cyclic number.

It is not a de Polignac number, because 39396989 - 2⁸ = 39396733 is a prime.

It is a super-2 number, since 2×39396989² = 3104245484532242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39396919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19698494 + 19698495.

It is an arithmetic number, because the mean of its divisors is an integer number (19698495).

Almost surely, 2^39396989 is an apocalyptic number.

It is an amenable number.

39396989 is a deficient number, since it is larger than the sum of its proper divisors (1).

39396989 is an equidigital number, since it uses as much as digits as its factorization.

39396989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2834352, while the sum is 56.

The square root of 39396989 is about 6276.7020799143. The cubic root of 39396989 is about 340.2679231900.

The spelling of 39396989 in words is "thirty-nine million, three hundred ninety-six thousand, nine hundred eighty-nine".