139949215 has 32 divisors (see below), whose sum is σ = 199946880. Its totient is φ = 92004864.

The previous prime is 139949213. The next prime is 139949237. The reversal of 139949215 is 512949931.

It is not a de Polignac number, because 139949215 - 2¹ = 139949213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139949213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175197 + ... + 175993.

It is an arithmetic number, because the mean of its divisors is an integer number (6248340).

Almost surely, 2^139949215 is an apocalyptic number.

139949215 is a deficient number, since it is larger than the sum of its proper divisors (59997665).

139949215 is a wasteful number, since it uses less digits than its factorization.

139949215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011.

The product of its digits is 87480, while the sum is 43.

The square root of 139949215 is about 11830.0133136020. The cubic root of 139949215 is about 519.1866166839.

The spelling of 139949215 in words is "one hundred thirty-nine million, nine hundred forty-nine thousand, two hundred fifteen".