139679599 has 4 divisors (see below), whose sum is σ = 147896064. Its totient is φ = 131463136.

The previous prime is 139679593. The next prime is 139679611. The reversal of 139679599 is 995976931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 995976931 = 359 ⋅2774309.

It is a cyclic number.

It is not a de Polignac number, because 139679599 - 2³ = 139679591 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 (139679591) 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, 4108207 + ... + 4108240.

It is an arithmetic number, because the mean of its divisors is an integer number (36974016).

Almost surely, 2^139679599 is an apocalyptic number.

139679599 is a deficient number, since it is larger than the sum of its proper divisors (8216465).

139679599 is an equidigital number, since it uses as much as digits as its factorization.

139679599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8216464.

The product of its digits is 4133430, while the sum is 58.

The square root of 139679599 is about 11818.6123974010. The cubic root of 139679599 is about 518.8529932629.

The spelling of 139679599 in words is "one hundred thirty-nine million, six hundred seventy-nine thousand, five hundred ninety-nine".