61146689 has 2 divisors, whose sum is σ = 61146690. Its totient is φ = 61146688.

The previous prime is 61146667. The next prime is 61146707. The reversal of 61146689 is 98664116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50694400 + 10452289 = 7120^2 + 3233^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61146689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61146289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30573344 + 30573345.

It is an arithmetic number, because the mean of its divisors is an integer number (30573345).

Almost surely, 2^61146689 is an apocalyptic number.

It is an amenable number.

61146689 is a deficient number, since it is larger than the sum of its proper divisors (1).

61146689 is an equidigital number, since it uses as much as digits as its factorization.

61146689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 41.

The square root of 61146689 is about 7819.6348380215. The cubic root of 61146689 is about 393.9650071562.

The spelling of 61146689 in words is "sixty-one million, one hundred forty-six thousand, six hundred eighty-nine".