61486693 has 4 divisors (see below), whose sum is σ = 61509580. Its totient is φ = 61463808.

The previous prime is 61486687. The next prime is 61486703. The reversal of 61486693 is 39668416.

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 19210689 + 42276004 = 4383^2 + 6502^2 .

It is a cyclic number.

It is not a de Polignac number, because 61486693 - 2⁹ = 61486181 is a prime.

It is a super-2 number, since 2×61486693² = 7561226832152498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61486393) 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, 6780 + ... + 12997.

It is an arithmetic number, because the mean of its divisors is an integer number (15377395).

Almost surely, 2^61486693 is an apocalyptic number.

It is an amenable number.

61486693 is a deficient number, since it is larger than the sum of its proper divisors (22887).

61486693 is a wasteful number, since it uses less digits than its factorization.

61486693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22886.

The product of its digits is 186624, while the sum is 43.

The square root of 61486693 is about 7841.3451014478. The cubic root of 61486693 is about 394.6938673799.

The spelling of 61486693 in words is "sixty-one million, four hundred eighty-six thousand, six hundred ninety-three".