61217307 has 6 divisors (see below), whose sum is σ = 88425012. Its totient is φ = 40811532.

The previous prime is 61217293. The next prime is 61217309. The reversal of 61217307 is 70371216.

61217307 is a `hidden beast` number, since 612 + 17 + 30 + 7 = 666.

61217307 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61217307 - 2¹² = 61213211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61217309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3400953 + ... + 3400970.

It is an arithmetic number, because the mean of its divisors is an integer number (14737502).

Almost surely, 2^61217307 is an apocalyptic number.

61217307 is a deficient number, since it is larger than the sum of its proper divisors (27207705).

61217307 is a wasteful number, since it uses less digits than its factorization.

61217307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6801929 (or 6801926 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 61217307 is about 7824.1489633058. The cubic root of 61217307 is about 394.1166115362.

The spelling of 61217307 in words is "sixty-one million, two hundred seventeen thousand, three hundred seven".