61580997 has 6 divisors (see below), whose sum is σ = 88950342. Its totient is φ = 41053992.

The previous prime is 61580993. The next prime is 61580999. The reversal of 61580997 is 79908516.

61580997 is a `hidden beast` number, since 61 + 580 + 9 + 9 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 59814756 + 1766241 = 7734^2 + 1329^2 .

It is not a de Polignac number, because 61580997 - 2² = 61580993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61580993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3421158 + ... + 3421175.

It is an arithmetic number, because the mean of its divisors is an integer number (14825057).

Almost surely, 2^61580997 is an apocalyptic number.

It is an amenable number.

61580997 is a deficient number, since it is larger than the sum of its proper divisors (27369345).

61580997 is a wasteful number, since it uses less digits than its factorization.

61580997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6842339 (or 6842336 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 61580997 is about 7847.3560515628. The cubic root of 61580997 is about 394.8955489457.

The spelling of 61580997 in words is "sixty-one million, five hundred eighty thousand, nine hundred ninety-seven".