139399958 has 8 divisors (see below), whose sum is σ = 210161952. Its totient is φ = 69345976.

The previous prime is 139399957. The next prime is 139399993. The reversal of 139399958 is 859993931.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139399951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176510 + ... + 177297.

It is an arithmetic number, because the mean of its divisors is an integer number (26270244).

Almost surely, 2^139399958 is an apocalyptic number.

139399958 is a deficient number, since it is larger than the sum of its proper divisors (70761994).

139399958 is a wasteful number, since it uses less digits than its factorization.

139399958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354006.

The product of its digits is 2361960, while the sum is 56.

The square root of 139399958 is about 11806.7759358768. The cubic root of 139399958 is about 518.5065110166.

The spelling of 139399958 in words is "one hundred thirty-nine million, three hundred ninety-nine thousand, nine hundred fifty-eight".