139213867 has 8 divisors (see below), whose sum is σ = 158741856. Its totient is φ = 120945792.

The previous prime is 139213861. The next prime is 139213883. The reversal of 139213867 is 768312931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139213867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139213861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314743 + ... + 315184.

It is an arithmetic number, because the mean of its divisors is an integer number (19842732).

Almost surely, 2^139213867 is an apocalyptic number.

139213867 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

139213867 is a deficient number, since it is larger than the sum of its proper divisors (19527989).

139213867 is a wasteful number, since it uses less digits than its factorization.

139213867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629957.

The product of its digits is 54432, while the sum is 40.

The square root of 139213867 is about 11798.8926175298. The cubic root of 139213867 is about 518.2756827238.

The spelling of 139213867 in words is "one hundred thirty-nine million, two hundred thirteen thousand, eight hundred sixty-seven".