61279559 has 8 divisors (see below), whose sum is σ = 67026960. Its totient is φ = 55561600.

The previous prime is 61279553. The next prime is 61279609. The reversal of 61279559 is 95597216.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61279559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61279553) 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, 2882 + ... + 11439.

It is an arithmetic number, because the mean of its divisors is an integer number (8378370).

Almost surely, 2^61279559 is an apocalyptic number.

61279559 is a deficient number, since it is larger than the sum of its proper divisors (5747401).

61279559 is a wasteful number, since it uses less digits than its factorization.

61279559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14721.

The product of its digits is 170100, while the sum is 44.

The square root of 61279559 is about 7828.1261487025. The cubic root of 61279559 is about 394.2501589309.

The spelling of 61279559 in words is "sixty-one million, two hundred seventy-nine thousand, five hundred fifty-nine".