61192889 has 2 divisors, whose sum is σ = 61192890. Its totient is φ = 61192888.

The previous prime is 61192867. The next prime is 61192921. The reversal of 61192889 is 98829116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57456400 + 3736489 = 7580^2 + 1933^2 .

It is a cyclic number.

It is not a de Polignac number, because 61192889 - 2⁸ = 61192633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61192819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30596444 + 30596445.

It is an arithmetic number, because the mean of its divisors is an integer number (30596445).

Almost surely, 2^61192889 is an apocalyptic number.

It is an amenable number.

61192889 is a deficient number, since it is larger than the sum of its proper divisors (1).

61192889 is an equidigital number, since it uses as much as digits as its factorization.

61192889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 44.

The square root of 61192889 is about 7822.5883823706. The cubic root of 61192889 is about 394.0642035941.

The spelling of 61192889 in words is "sixty-one million, one hundred ninety-two thousand, eight hundred eighty-nine".