139135954 has 4 divisors (see below), whose sum is σ = 208703934. Its totient is φ = 69567976.

The previous prime is 139135951. The next prime is 139135957. The reversal of 139135954 is 459531931.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (139135951) and next prime (139135957).

It can be written as a sum of positive squares in only one way, i.e., 116316225 + 22819729 = 10785^2 + 4777^2 .

It is not an unprimeable number, because it can be changed into a prime (139135951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34783987 + ... + 34783990.

Almost surely, 2^139135954 is an apocalyptic number.

139135954 is a deficient number, since it is larger than the sum of its proper divisors (69567980).

139135954 is an equidigital number, since it uses as much as digits as its factorization.

139135954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69567979.

The product of its digits is 72900, while the sum is 40.

The square root of 139135954 is about 11795.5904472816. The cubic root of 139135954 is about 518.1789779208.

The spelling of 139135954 in words is "one hundred thirty-nine million, one hundred thirty-five thousand, nine hundred fifty-four".