139144634 has 4 divisors (see below), whose sum is σ = 208716954. Its totient is φ = 69572316.

The previous prime is 139144631. The next prime is 139144637. The reversal of 139144634 is 436441931.

139144634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 436441931 = 523 ⋅834497.

It is an interprime number because it is at equal distance from previous prime (139144631) and next prime (139144637).

It can be written as a sum of positive squares in only one way, i.e., 69672409 + 69472225 = 8347^2 + 8335^2 .

It is a super-2 number, since 2×139144634² = 38722458341987912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139144594 and 139144603.

It is not an unprimeable number, because it can be changed into a prime (139144631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34786157 + ... + 34786160.

Almost surely, 2^139144634 is an apocalyptic number.

139144634 is a deficient number, since it is larger than the sum of its proper divisors (69572320).

139144634 is an equidigital number, since it uses as much as digits as its factorization.

139144634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69572319.

The product of its digits is 31104, while the sum is 35.

The square root of 139144634 is about 11795.9583756471. The cubic root of 139144634 is about 518.1897532329.

The spelling of 139144634 in words is "one hundred thirty-nine million, one hundred forty-four thousand, six hundred thirty-four".