61825891 has 4 divisors (see below), whose sum is σ = 61989400. Its totient is φ = 61662384.

The previous prime is 61825871. The next prime is 61825913. The reversal of 61825891 is 19852816.

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

It is a cyclic number.

It is not a de Polignac number, because 61825891 - 2⁵ = 61825859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61825801) 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, 81186 + ... + 81943.

It is an arithmetic number, because the mean of its divisors is an integer number (15497350).

Almost surely, 2^61825891 is an apocalyptic number.

61825891 is a deficient number, since it is larger than the sum of its proper divisors (163509).

61825891 is a wasteful number, since it uses less digits than its factorization.

61825891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163508.

The product of its digits is 34560, while the sum is 40.

The square root of 61825891 is about 7862.9441686941. The cubic root of 61825891 is about 395.4183273075.

The spelling of 61825891 in words is "sixty-one million, eight hundred twenty-five thousand, eight hundred ninety-one".