139402634 has 8 divisors (see below), whose sum is σ = 238975968. Its totient is φ = 59743980.

The previous prime is 139402631. The next prime is 139402657. The reversal of 139402634 is 436204931.

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

It is a super-2 number, since 2×139402634² = 38866188732275912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 139402634.

It is not an unprimeable number, because it can be changed into a prime (139402631) 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 3 ways as a sum of consecutive naturals, for example, 4978652 + ... + 4978679.

It is an arithmetic number, because the mean of its divisors is an integer number (29871996).

Almost surely, 2^139402634 is an apocalyptic number.

139402634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

139402634 is a deficient number, since it is larger than the sum of its proper divisors (99573334).

139402634 is an equidigital number, since it uses as much as digits as its factorization.

139402634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9957340.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 139402634 is about 11806.8892600888. The cubic root of 139402634 is about 518.5098288429.

The spelling of 139402634 in words is "one hundred thirty-nine million, four hundred two thousand, six hundred thirty-four".