61329413 has 2 divisors, whose sum is σ = 61329414. Its totient is φ = 61329412.

The previous prime is 61329409. The next prime is 61329419. The reversal of 61329413 is 31492316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50452609 + 10876804 = 7103^2 + 3298^2 .

It is a cyclic number.

It is not a de Polignac number, because 61329413 - 2² = 61329409 is a prime.

It is a super-2 number, since 2×61329413² = 7522593797849138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61329419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30664706 + 30664707.

It is an arithmetic number, because the mean of its divisors is an integer number (30664707).

Almost surely, 2^61329413 is an apocalyptic number.

It is an amenable number.

61329413 is a deficient number, since it is larger than the sum of its proper divisors (1).

61329413 is an equidigital number, since it uses as much as digits as its factorization.

61329413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 29.

The square root of 61329413 is about 7831.3097882794. The cubic root of 61329413 is about 394.3570440546.

The spelling of 61329413 in words is "sixty-one million, three hundred twenty-nine thousand, four hundred thirteen".