139399214 has 4 divisors (see below), whose sum is σ = 209098824. Its totient is φ = 69699606.

The previous prime is 139399207. The next prime is 139399223. The reversal of 139399214 is 412993931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 412993931 = 7 ⋅58999133.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34849802 + ... + 34849805.

It is an arithmetic number, because the mean of its divisors is an integer number (52274706).

Almost surely, 2^139399214 is an apocalyptic number.

139399214 is a deficient number, since it is larger than the sum of its proper divisors (69699610).

139399214 is an equidigital number, since it uses as much as digits as its factorization.

139399214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69699609.

The product of its digits is 52488, while the sum is 41.

The square root of 139399214 is about 11806.7444285036. The cubic root of 139399214 is about 518.5055885641.

The spelling of 139399214 in words is "one hundred thirty-nine million, three hundred ninety-nine thousand, two hundred fourteen".