39429347929 has 2 divisors, whose sum is σ = 39429347930. Its totient is φ = 39429347928.

The previous prime is 39429347921. The next prime is 39429347957. The reversal of 39429347929 is 92974392493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19814785225 + 19614562704 = 140765^2 + 140052^2 .

It is a cyclic number.

It is not a de Polignac number, because 39429347929 - 2³ = 39429347921 is a prime.

It is a super-2 number, since 2×39429347929² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39429347921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19714673964 + 19714673965.

It is an arithmetic number, because the mean of its divisors is an integer number (19714673965).

Almost surely, 2^39429347929 is an apocalyptic number.

It is an amenable number.

39429347929 is a deficient number, since it is larger than the sum of its proper divisors (1).

39429347929 is an equidigital number, since it uses as much as digits as its factorization.

39429347929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26453952, while the sum is 61.

The spelling of 39429347929 in words is "thirty-nine billion, four hundred twenty-nine million, three hundred forty-seven thousand, nine hundred twenty-nine".