61015897 has 4 divisors (see below), whose sum is σ = 64227280. Its totient is φ = 57804516.

The previous prime is 61015891. The next prime is 61015931. The reversal of 61015897 is 79851016.

61015897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61015897 - 2⁷ = 61015769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61015891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1605663 + ... + 1605700.

It is an arithmetic number, because the mean of its divisors is an integer number (16056820).

Almost surely, 2^61015897 is an apocalyptic number.

It is an amenable number.

61015897 is a deficient number, since it is larger than the sum of its proper divisors (3211383).

61015897 is a wasteful number, since it uses less digits than its factorization.

61015897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211382.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 61015897 is about 7811.2673107505. The cubic root of 61015897 is about 393.6839112394.

The spelling of 61015897 in words is "sixty-one million, fifteen thousand, eight hundred ninety-seven".