139473094 has 4 divisors (see below), whose sum is σ = 209209644. Its totient is φ = 69736546.

The previous prime is 139473079. The next prime is 139473097. The reversal of 139473094 is 490374931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 490374931 = 2441 ⋅200891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139473097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34868272 + ... + 34868275.

It is an arithmetic number, because the mean of its divisors is an integer number (52302411).

Almost surely, 2^139473094 is an apocalyptic number.

139473094 is a deficient number, since it is larger than the sum of its proper divisors (69736550).

139473094 is an equidigital number, since it uses as much as digits as its factorization.

139473094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69736549.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 139473094 is about 11809.8727342847. The cubic root of 139473094 is about 518.5971730772.

The spelling of 139473094 in words is "one hundred thirty-nine million, four hundred seventy-three thousand, ninety-four".