61139319 has 8 divisors (see below), whose sum is σ = 82066800. Its totient is φ = 40485696.

The previous prime is 61139311. The next prime is 61139329. The reversal of 61139319 is 91393116.

It is a happy number.

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

It is not a de Polignac number, because 61139319 - 2³ = 61139311 is a prime.

It is a super-2 number, since 2×61139319² = 7476032655567522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61139319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61139311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67942 + ... + 68835.

It is an arithmetic number, because the mean of its divisors is an integer number (10258350).

Almost surely, 2^61139319 is an apocalyptic number.

61139319 is a deficient number, since it is larger than the sum of its proper divisors (20927481).

61139319 is a wasteful number, since it uses less digits than its factorization.

61139319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136929.

The product of its digits is 4374, while the sum is 33.

The square root of 61139319 is about 7819.1635741939. The cubic root of 61139319 is about 393.9491783418.

The spelling of 61139319 in words is "sixty-one million, one hundred thirty-nine thousand, three hundred nineteen".