61797889 has 4 divisors (see below), whose sum is σ = 61912660. Its totient is φ = 61683120.

The previous prime is 61797887. The next prime is 61797917. The reversal of 61797889 is 98879716.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38440000 + 23357889 = 6200^2 + 4833^2 .

It is a cyclic number.

It is not a de Polignac number, because 61797889 - 2¹ = 61797887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61797887) 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, 56574 + ... + 57655.

It is an arithmetic number, because the mean of its divisors is an integer number (15478165).

Almost surely, 2^61797889 is an apocalyptic number.

It is an amenable number.

61797889 is a deficient number, since it is larger than the sum of its proper divisors (114771).

61797889 is a wasteful number, since it uses less digits than its factorization.

61797889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114770.

The product of its digits is 1524096, while the sum is 55.

The square root of 61797889 is about 7861.1633363008. The cubic root of 61797889 is about 395.3586210589.

The spelling of 61797889 in words is "sixty-one million, seven hundred ninety-seven thousand, eight hundred eighty-nine".