39740669 has 2 divisors, whose sum is σ = 39740670. Its totient is φ = 39740668.

The previous prime is 39740651. The next prime is 39740677. The reversal of 39740669 is 96604793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21576025 + 18164644 = 4645^2 + 4262^2 .

It is a cyclic number.

It is not a de Polignac number, because 39740669 - 2⁸ = 39740413 is a prime.

It is a super-2 number, since 2×39740669² = 3158641545135122, 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 (39740639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19870334 + 19870335.

It is an arithmetic number, because the mean of its divisors is an integer number (19870335).

Almost surely, 2^39740669 is an apocalyptic number.

It is an amenable number.

39740669 is a deficient number, since it is larger than the sum of its proper divisors (1).

39740669 is an equidigital number, since it uses as much as digits as its factorization.

39740669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 39740669 is about 6304.0200665924. The cubic root of 39740669 is about 341.2545033777.

The spelling of 39740669 in words is "thirty-nine million, seven hundred forty thousand, six hundred sixty-nine".