61804331 has 2 divisors, whose sum is σ = 61804332. Its totient is φ = 61804330.

The previous prime is 61804313. The next prime is 61804339. The reversal of 61804331 is 13340816.

Together with previous prime (61804313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61804331 is a prime.

It is a super-2 number, since 2×61804331² = 7639550660715122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61804331.

It is not a weakly prime, because it can be changed into another prime (61804339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30902165 + 30902166.

It is an arithmetic number, because the mean of its divisors is an integer number (30902166).

Almost surely, 2^61804331 is an apocalyptic number.

61804331 is a deficient number, since it is larger than the sum of its proper divisors (1).

61804331 is an equidigital number, since it uses as much as digits as its factorization.

61804331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 61804331 is about 7861.5730614172. The cubic root of 61804331 is about 395.3723583768.

The spelling of 61804331 in words is "sixty-one million, eight hundred four thousand, three hundred thirty-one".