61489385 has 4 divisors (see below), whose sum is σ = 73787268. Its totient is φ = 49191504.

The previous prime is 61489361. The next prime is 61489427. The reversal of 61489385 is 58398416.

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 37908649 + 23580736 = 6157^2 + 4856^2 .

It is a cyclic number.

It is not a de Polignac number, because 61489385 - 2⁶ = 61489321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6148934 + ... + 6148943.

It is an arithmetic number, because the mean of its divisors is an integer number (18446817).

Almost surely, 2^61489385 is an apocalyptic number.

It is an amenable number.

61489385 is a deficient number, since it is larger than the sum of its proper divisors (12297883).

61489385 is a wasteful number, since it uses less digits than its factorization.

61489385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12297882.

The product of its digits is 207360, while the sum is 44.

The square root of 61489385 is about 7841.5167537920. The cubic root of 61489385 is about 394.6996274359.

The spelling of 61489385 in words is "sixty-one million, four hundred eighty-nine thousand, three hundred eighty-five".