61830491 has 2 divisors, whose sum is σ = 61830492. Its totient is φ = 61830490.

The previous prime is 61830473. The next prime is 61830493. The reversal of 61830491 is 19403816.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61830491 is a prime.

It is a Sophie Germain prime.

Together with 61830493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61830493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30915245 + 30915246.

It is an arithmetic number, because the mean of its divisors is an integer number (30915246).

Almost surely, 2^61830491 is an apocalyptic number.

61830491 is a deficient number, since it is larger than the sum of its proper divisors (1).

61830491 is an equidigital number, since it uses as much as digits as its factorization.

61830491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 61830491 is about 7863.2366745508. The cubic root of 61830491 is about 395.4281337665.

The spelling of 61830491 in words is "sixty-one million, eight hundred thirty thousand, four hundred ninety-one".