139870079 has 4 divisors (see below), whose sum is σ = 141177384. Its totient is φ = 138562776.

The previous prime is 139870043. The next prime is 139870091. The reversal of 139870079 is 970078931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139870079 - 2¹² = 139865983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139870009) 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, 653492 + ... + 653705.

It is an arithmetic number, because the mean of its divisors is an integer number (35294346).

Almost surely, 2^139870079 is an apocalyptic number.

139870079 is a deficient number, since it is larger than the sum of its proper divisors (1307305).

139870079 is a wasteful number, since it uses less digits than its factorization.

139870079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307304.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 139870079 is about 11826.6681275835. The cubic root of 139870079 is about 519.0887380860.

The spelling of 139870079 in words is "one hundred thirty-nine million, eight hundred seventy thousand, seventy-nine".