139257433 has 8 divisors (see below), whose sum is σ = 166071168. Its totient is φ = 114173664.

The previous prime is 139257431. The next prime is 139257439. The reversal of 139257433 is 334752931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139257433 - 2¹ = 139257431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139257392 and 139257401.

It is not an unprimeable number, because it can be changed into a prime (139257431) 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 in 7 ways as a sum of consecutive naturals, for example, 432316 + ... + 432637.

It is an arithmetic number, because the mean of its divisors is an integer number (20758896).

Almost surely, 2^139257433 is an apocalyptic number.

It is an amenable number.

139257433 is a deficient number, since it is larger than the sum of its proper divisors (26813735).

139257433 is an equidigital number, since it uses as much as digits as its factorization.

139257433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864983.

The product of its digits is 68040, while the sum is 37.

The square root of 139257433 is about 11800.7386633210. The cubic root of 139257433 is about 518.3297406611.

The spelling of 139257433 in words is "one hundred thirty-nine million, two hundred fifty-seven thousand, four hundred thirty-three".