139373329 has 2 divisors, whose sum is σ = 139373330. Its totient is φ = 139373328.

The previous prime is 139373323. The next prime is 139373347. The reversal of 139373329 is 923373931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84272400 + 55100929 = 9180^2 + 7423^2 .

It is a cyclic number.

It is not a de Polignac number, because 139373329 - 2³ = 139373321 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 139373291 and 139373300.

It is not a weakly prime, because it can be changed into another prime (139373321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69686664 + 69686665.

It is an arithmetic number, because the mean of its divisors is an integer number (69686665).

Almost surely, 2^139373329 is an apocalyptic number.

It is an amenable number.

139373329 is a deficient number, since it is larger than the sum of its proper divisors (1).

139373329 is an equidigital number, since it uses as much as digits as its factorization.

139373329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91854, while the sum is 40.

The square root of 139373329 is about 11805.6481821203. The cubic root of 139373329 is about 518.4734928594.

The spelling of 139373329 in words is "one hundred thirty-nine million, three hundred seventy-three thousand, three hundred twenty-nine".