139918967 has 4 divisors (see below), whose sum is σ = 139943760. Its totient is φ = 139894176.

The previous prime is 139918951. The next prime is 139918969. The reversal of 139918967 is 769819931.

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 139918967 - 2⁴ = 139918951 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 (139918969) 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, 638 + ... + 16740.

It is an arithmetic number, because the mean of its divisors is an integer number (34985940).

Almost surely, 2^139918967 is an apocalyptic number.

139918967 is a deficient number, since it is larger than the sum of its proper divisors (24793).

139918967 is an equidigital number, since it uses as much as digits as its factorization.

139918967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24792.

The product of its digits is 734832, while the sum is 53.

The square root of 139918967 is about 11828.7348013217. The cubic root of 139918967 is about 519.1492090944.

The spelling of 139918967 in words is "one hundred thirty-nine million, nine hundred eighteen thousand, nine hundred sixty-seven".