61227891 has 6 divisors (see below), whose sum is σ = 88440300. Its totient is φ = 40818588.

The previous prime is 61227889. The next prime is 61227893. The reversal of 61227891 is 19872216.

It is an interprime number because it is at equal distance from previous prime (61227889) and next prime (61227893).

It is not a de Polignac number, because 61227891 - 2¹ = 61227889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61227893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3401541 + ... + 3401558.

It is an arithmetic number, because the mean of its divisors is an integer number (14740050).

Almost surely, 2^61227891 is an apocalyptic number.

61227891 is a deficient number, since it is larger than the sum of its proper divisors (27212409).

61227891 is a wasteful number, since it uses less digits than its factorization.

61227891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6803105 (or 6803102 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 61227891 is about 7824.8253015642. The cubic root of 61227891 is about 394.1393234676.

The spelling of 61227891 in words is "sixty-one million, two hundred twenty-seven thousand, eight hundred ninety-one".