139145359 has 4 divisors (see below), whose sum is σ = 140708880. Its totient is φ = 137581840.

The previous prime is 139145353. The next prime is 139145371. The reversal of 139145359 is 953541931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 953541931 = 83 ⋅11488457.

It is a cyclic number.

It is not a de Polignac number, because 139145359 - 2³ = 139145351 is a prime.

It is a super-2 number, since 2×139145359² = 38722861862477762, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139145351) 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, 781627 + ... + 781804.

It is an arithmetic number, because the mean of its divisors is an integer number (35177220).

Almost surely, 2^139145359 is an apocalyptic number.

139145359 is a deficient number, since it is larger than the sum of its proper divisors (1563521).

139145359 is an equidigital number, since it uses as much as digits as its factorization.

139145359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563520.

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

The square root of 139145359 is about 11795.9891064717. The cubic root of 139145359 is about 518.1906532243.

The spelling of 139145359 in words is "one hundred thirty-nine million, one hundred forty-five thousand, three hundred fifty-nine".