61898651 has 2 divisors, whose sum is σ = 61898652. Its totient is φ = 61898650.

The previous prime is 61898621. The next prime is 61898689. The reversal of 61898651 is 15689816.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61898651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61898621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30949325 + 30949326.

It is an arithmetic number, because the mean of its divisors is an integer number (30949326).

Almost surely, 2^61898651 is an apocalyptic number.

61898651 is a deficient number, since it is larger than the sum of its proper divisors (1).

61898651 is an equidigital number, since it uses as much as digits as its factorization.

61898651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 44.

The square root of 61898651 is about 7867.5695738900. The cubic root of 61898651 is about 395.5733829438.

The spelling of 61898651 in words is "sixty-one million, eight hundred ninety-eight thousand, six hundred fifty-one".