39979741 has 2 divisors, whose sum is σ = 39979742. Its totient is φ = 39979740.

The previous prime is 39979729. The next prime is 39979747. The reversal of 39979741 is 14797993.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33977241 + 6002500 = 5829^2 + 2450^2 .

It is a cyclic number.

It is not a de Polignac number, because 39979741 - 2⁷ = 39979613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39979747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19989870 + 19989871.

It is an arithmetic number, because the mean of its divisors is an integer number (19989871).

Almost surely, 2^39979741 is an apocalyptic number.

It is an amenable number.

39979741 is a deficient number, since it is larger than the sum of its proper divisors (1).

39979741 is an equidigital number, since it uses as much as digits as its factorization.

39979741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 49.

The square root of 39979741 is about 6322.9535029130. The cubic root of 39979741 is about 341.9374422473.

The spelling of 39979741 in words is "thirty-nine million, nine hundred seventy-nine thousand, seven hundred forty-one".