32139739 has 2 divisors, whose sum is σ = 32139740. Its totient is φ = 32139738.

The previous prime is 32139733. The next prime is 32139781. The reversal of 32139739 is 93793123.

It is a weak prime.

It is an emirp because it is prime and its reverse (93793123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32139739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 32139698 and 32139707.

It is not a weakly prime, because it can be changed into another prime (32139733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16069869 + 16069870.

It is an arithmetic number, because the mean of its divisors is an integer number (16069870).

Almost surely, 2^32139739 is an apocalyptic number.

32139739 is a deficient number, since it is larger than the sum of its proper divisors (1).

32139739 is an equidigital number, since it uses as much as digits as its factorization.

32139739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 37.

The square root of 32139739 is about 5669.1920941171. The cubic root of 32139739 is about 317.9416681636.

The spelling of 32139739 in words is "thirty-two million, one hundred thirty-nine thousand, seven hundred thirty-nine".