61309700 has 18 divisors (see below), whose sum is σ = 133042266. Its totient is φ = 24523840.

The previous prime is 61309687. The next prime is 61309709. The reversal of 61309700 is 790316.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 17960644 + 43349056 = 4238^2 + 6584^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61309700.

It is not an unprimeable number, because it can be changed into a prime (61309709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 306449 + ... + 306648.

It is an arithmetic number, because the mean of its divisors is an integer number (7391237).

Almost surely, 2^61309700 is an apocalyptic number.

It is an amenable number.

61309700 is an abundant number, since it is smaller than the sum of its proper divisors (71732566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61309700 is a wasteful number, since it uses less digits than its factorization.

61309700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613111 (or 613104 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 61309700 is about 7830.0510854017. The cubic root of 61309700 is about 394.3147870412.

The spelling of 61309700 in words is "sixty-one million, three hundred nine thousand, seven hundred".