61807013 has 2 divisors, whose sum is σ = 61807014. Its totient is φ = 61807012.

The previous prime is 61806973. The next prime is 61807037. The reversal of 61807013 is 31070816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52085089 + 9721924 = 7217^2 + 3118^2 .

It is a cyclic number.

It is not a de Polignac number, because 61807013 - 2⁶ = 61806949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61807913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30903506 + 30903507.

It is an arithmetic number, because the mean of its divisors is an integer number (30903507).

Almost surely, 2^61807013 is an apocalyptic number.

It is an amenable number.

61807013 is a deficient number, since it is larger than the sum of its proper divisors (1).

61807013 is an equidigital number, since it uses as much as digits as its factorization.

61807013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 61807013 is about 7861.7436361153. The cubic root of 61807013 is about 395.3780773575.

Adding to 61807013 its reverse (31070816), we get a palindrome (92877829).

The spelling of 61807013 in words is "sixty-one million, eight hundred seven thousand, thirteen".