61844891 has 2 divisors, whose sum is σ = 61844892. Its totient is φ = 61844890.

The previous prime is 61844873. The next prime is 61844899. The reversal of 61844891 is 19844816.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61844891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61844899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30922445 + 30922446.

It is an arithmetic number, because the mean of its divisors is an integer number (30922446).

Almost surely, 2^61844891 is an apocalyptic number.

61844891 is a deficient number, since it is larger than the sum of its proper divisors (1).

61844891 is an equidigital number, since it uses as much as digits as its factorization.

61844891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 41.

The square root of 61844891 is about 7864.1522747210. The cubic root of 61844891 is about 395.4588291028.

The spelling of 61844891 in words is "sixty-one million, eight hundred forty-four thousand, eight hundred ninety-one".