61590289 has 2 divisors, whose sum is σ = 61590290. Its totient is φ = 61590288.

The previous prime is 61590283. The next prime is 61590313. The reversal of 61590289 is 98209516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60606225 + 984064 = 7785^2 + 992^2 .

It is a cyclic number.

It is not a de Polignac number, because 61590289 - 2³ = 61590281 is a prime.

It is not a weakly prime, because it can be changed into another prime (61590281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30795144 + 30795145.

It is an arithmetic number, because the mean of its divisors is an integer number (30795145).

Almost surely, 2^61590289 is an apocalyptic number.

It is an amenable number.

61590289 is a deficient number, since it is larger than the sum of its proper divisors (1).

61590289 is an equidigital number, since it uses as much as digits as its factorization.

61590289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 61590289 is about 7847.9480757711. The cubic root of 61590289 is about 394.9154099693.

The spelling of 61590289 in words is "sixty-one million, five hundred ninety thousand, two hundred eighty-nine".