39672749 has 2 divisors, whose sum is σ = 39672750. Its totient is φ = 39672748.

The previous prime is 39672739. The next prime is 39672751. The reversal of 39672749 is 94727693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38502025 + 1170724 = 6205^2 + 1082^2 .

It is a cyclic number.

It is not a de Polignac number, because 39672749 - 2¹² = 39668653 is a prime.

Together with 39672751, 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 (39672719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19836374 + 19836375.

It is an arithmetic number, because the mean of its divisors is an integer number (19836375).

Almost surely, 2^39672749 is an apocalyptic number.

It is an amenable number.

39672749 is a deficient number, since it is larger than the sum of its proper divisors (1).

39672749 is an equidigital number, since it uses as much as digits as its factorization.

39672749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 47.

The square root of 39672749 is about 6298.6307242130. The cubic root of 39672749 is about 341.0599820526.

The spelling of 39672749 in words is "thirty-nine million, six hundred seventy-two thousand, seven hundred forty-nine".