139091434 has 8 divisors (see below), whose sum is σ = 213725988. Its totient is φ = 67849440.

The previous prime is 139091423. The next prime is 139091437. The reversal of 139091434 is 434190931.

139091434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 138886225 + 205209 = 11785^2 + 453^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 139091434.

It is not an unprimeable number, because it can be changed into a prime (139091437) 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, 848037 + ... + 848200.

Almost surely, 2^139091434 is an apocalyptic number.

139091434 is a deficient number, since it is larger than the sum of its proper divisors (74634554).

139091434 is a wasteful number, since it uses less digits than its factorization.

139091434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696280.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 139091434 is about 11793.7031504104. The cubic root of 139091434 is about 518.1237039521.

The spelling of 139091434 in words is "one hundred thirty-nine million, ninety-one thousand, four hundred thirty-four".