61884891 has 10 divisors (see below), whose sum is σ = 92445452. Its totient is φ = 41256540.

The previous prime is 61884877. The next prime is 61884899. The reversal of 61884891 is 19848816.

It is not a de Polignac number, because 61884891 - 2⁷ = 61884763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61884899) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 381925 + ... + 382086.

Almost surely, 2^61884891 is an apocalyptic number.

61884891 is a deficient number, since it is larger than the sum of its proper divisors (30560561).

61884891 is an equidigital number, since it uses as much as digits as its factorization.

61884891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764023 (or 764014 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 61884891 is about 7866.6950493838. The cubic root of 61884891 is about 395.5440689332.

The spelling of 61884891 in words is "sixty-one million, eight hundred eighty-four thousand, eight hundred ninety-one".