61492861 has 4 divisors (see below), whose sum is σ = 61941852. Its totient is φ = 61043872.

The previous prime is 61492829. The next prime is 61492867. The reversal of 61492861 is 16829416.

It is a happy number.

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 47196900 + 14295961 = 6870^2 + 3781^2 .

It is a cyclic number.

It is not a de Polignac number, because 61492861 - 2⁵ = 61492829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61492861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61492867) 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, 224290 + ... + 224563.

It is an arithmetic number, because the mean of its divisors is an integer number (15485463).

Almost surely, 2^61492861 is an apocalyptic number.

It is an amenable number.

61492861 is a deficient number, since it is larger than the sum of its proper divisors (448991).

61492861 is a wasteful number, since it uses less digits than its factorization.

61492861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448990.

The product of its digits is 20736, while the sum is 37.

The square root of 61492861 is about 7841.7383914538. The cubic root of 61492861 is about 394.7070647632.

The spelling of 61492861 in words is "sixty-one million, four hundred ninety-two thousand, eight hundred sixty-one".