61240689 has 12 divisors (see below), whose sum is σ = 89243076. Its totient is φ = 40465152.

The previous prime is 61240679. The next prime is 61240691. The reversal of 61240689 is 98604216.

It can be written as a sum of positive squares in 2 ways, for example, as 400689 + 60840000 = 633^2 + 7800^2 .

It is not a de Polignac number, because 61240689 - 2⁷ = 61240561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61240679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29092 + ... + 31125.

It is an arithmetic number, because the mean of its divisors is an integer number (7436923).

Almost surely, 2^61240689 is an apocalyptic number.

It is an amenable number.

61240689 is a deficient number, since it is larger than the sum of its proper divisors (28002387).

61240689 is a wasteful number, since it uses less digits than its factorization.

61240689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60336 (or 60333 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 61240689 is about 7825.6430406708. The cubic root of 61240689 is about 394.1667828687.

The spelling of 61240689 in words is "sixty-one million, two hundred forty thousand, six hundred eighty-nine".