39747949 has 2 divisors, whose sum is σ = 39747950. Its totient is φ = 39747948.

The previous prime is 39747941. The next prime is 39747971. The reversal of 39747949 is 94974793.

39747949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33143049 + 6604900 = 5757^2 + 2570^2 .

It is a cyclic number.

It is not a de Polignac number, because 39747949 - 2³ = 39747941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39747896 and 39747905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39747941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19873974 + 19873975.

It is an arithmetic number, because the mean of its divisors is an integer number (19873975).

Almost surely, 2^39747949 is an apocalyptic number.

It is an amenable number.

39747949 is a deficient number, since it is larger than the sum of its proper divisors (1).

39747949 is an equidigital number, since it uses as much as digits as its factorization.

39747949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 52.

The square root of 39747949 is about 6304.5974494808. The cubic root of 39747949 is about 341.2753399763.

It can be divided in two parts, 3974 and 7949, that multiplied together give a triangular number (31589326 = T₇₉₄₈).

The spelling of 39747949 in words is "thirty-nine million, seven hundred forty-seven thousand, nine hundred forty-nine".