61317379 has 4 divisors (see below), whose sum is σ = 63983376. Its totient is φ = 58651384.

The previous prime is 61317367. The next prime is 61317409. The reversal of 61317379 is 97371316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61317379 - 2¹⁵ = 61284611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61317359) 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, 1332964 + ... + 1333009.

It is an arithmetic number, because the mean of its divisors is an integer number (15995844).

Almost surely, 2^61317379 is an apocalyptic number.

61317379 is a deficient number, since it is larger than the sum of its proper divisors (2665997).

61317379 is a wasteful number, since it uses less digits than its factorization.

61317379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665996.

The product of its digits is 23814, while the sum is 37.

The square root of 61317379 is about 7830.5414244482. The cubic root of 61317379 is about 394.3312489107.

The spelling of 61317379 in words is "sixty-one million, three hundred seventeen thousand, three hundred seventy-nine".