61715379 has 8 divisors (see below), whose sum is σ = 89767872. Its totient is φ = 37403240.

The previous prime is 61715369. The next prime is 61715411. The reversal of 61715379 is 97351716.

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

It is a cyclic number.

It is not a de Polignac number, because 61715379 - 2¹³ = 61707187 is a prime.

It is a super-2 number, since 2×61715379² = 7617576010227282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61715309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 935049 + ... + 935114.

It is an arithmetic number, because the mean of its divisors is an integer number (11220984).

Almost surely, 2^61715379 is an apocalyptic number.

61715379 is a deficient number, since it is larger than the sum of its proper divisors (28052493).

61715379 is a wasteful number, since it uses less digits than its factorization.

61715379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870177.

The product of its digits is 39690, while the sum is 39.

The square root of 61715379 is about 7855.9136324173. The cubic root of 61715379 is about 395.1825871672.

The spelling of 61715379 in words is "sixty-one million, seven hundred fifteen thousand, three hundred seventy-nine".