39696641 has 2 divisors, whose sum is σ = 39696642. Its totient is φ = 39696640.

The previous prime is 39696619. The next prime is 39696661. The reversal of 39696641 is 14669693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38440000 + 1256641 = 6200^2 + 1121^2 .

It is an emirp because it is prime and its reverse (14669693) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39696641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39696592 and 39696601.

It is not a weakly prime, because it can be changed into another prime (39696661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19848320 + 19848321.

It is an arithmetic number, because the mean of its divisors is an integer number (19848321).

Almost surely, 2^39696641 is an apocalyptic number.

It is an amenable number.

39696641 is a deficient number, since it is larger than the sum of its proper divisors (1).

39696641 is an equidigital number, since it uses as much as digits as its factorization.

39696641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 44.

The square root of 39696641 is about 6300.5270414466. The cubic root of 39696641 is about 341.1284334882.

The spelling of 39696641 in words is "thirty-nine million, six hundred ninety-six thousand, six hundred forty-one".