139663331 has 2 divisors, whose sum is σ = 139663332. Its totient is φ = 139663330.

The previous prime is 139663327. The next prime is 139663369. The reversal of 139663331 is 133366931.

139663331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139663331 - 2² = 139663327 is a prime.

It is a super-2 number, since 2×139663331² = 39011692052031122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139663291 and 139663300.

It is not a weakly prime, because it can be changed into another prime (139663301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69831665 + 69831666.

It is an arithmetic number, because the mean of its divisors is an integer number (69831666).

Almost surely, 2^139663331 is an apocalyptic number.

139663331 is a deficient number, since it is larger than the sum of its proper divisors (1).

139663331 is an equidigital number, since it uses as much as digits as its factorization.

139663331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26244, while the sum is 35.

The square root of 139663331 is about 11817.9241408972. The cubic root of 139663331 is about 518.8328494761.

The spelling of 139663331 in words is "one hundred thirty-nine million, six hundred sixty-three thousand, three hundred thirty-one".