61037813 has 2 divisors, whose sum is σ = 61037814. Its totient is φ = 61037812.

The previous prime is 61037797. The next prime is 61037839. The reversal of 61037813 is 31873016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49252324 + 11785489 = 7018^2 + 3433^2 .

It is a cyclic number.

It is not a de Polignac number, because 61037813 - 2⁴ = 61037797 is a prime.

It is a super-2 number, since 2×61037813² = 7451229231645938, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61037863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30518906 + 30518907.

It is an arithmetic number, because the mean of its divisors is an integer number (30518907).

Almost surely, 2^61037813 is an apocalyptic number.

It is an amenable number.

61037813 is a deficient number, since it is larger than the sum of its proper divisors (1).

61037813 is an equidigital number, since it uses as much as digits as its factorization.

61037813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 61037813 is about 7812.6700301497. The cubic root of 61037813 is about 393.7310407265.

The spelling of 61037813 in words is "sixty-one million, thirty-seven thousand, eight hundred thirteen".