61820659 has 2 divisors, whose sum is σ = 61820660. Its totient is φ = 61820658.

The previous prime is 61820639. The next prime is 61820669. The reversal of 61820659 is 95602816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61820659 - 2⁷ = 61820531 is a prime.

It is not a weakly prime, because it can be changed into another prime (61820609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30910329 + 30910330.

It is an arithmetic number, because the mean of its divisors is an integer number (30910330).

Almost surely, 2^61820659 is an apocalyptic number.

61820659 is a deficient number, since it is larger than the sum of its proper divisors (1).

61820659 is an equidigital number, since it uses as much as digits as its factorization.

61820659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 61820659 is about 7862.6114618490. The cubic root of 61820659 is about 395.4071729351.

The spelling of 61820659 in words is "sixty-one million, eight hundred twenty thousand, six hundred fifty-nine".