61745413 has 2 divisors, whose sum is σ = 61745414. Its totient is φ = 61745412.

The previous prime is 61745407. The next prime is 61745417. The reversal of 61745413 is 31454716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57259489 + 4485924 = 7567^2 + 2118^2 .

It is a cyclic number.

It is not a de Polignac number, because 61745413 - 2⁵ = 61745381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61745417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30872706 + 30872707.

It is an arithmetic number, because the mean of its divisors is an integer number (30872707).

Almost surely, 2^61745413 is an apocalyptic number.

It is an amenable number.

61745413 is a deficient number, since it is larger than the sum of its proper divisors (1).

61745413 is an equidigital number, since it uses as much as digits as its factorization.

61745413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 61745413 is about 7857.8249535097. The cubic root of 61745413 is about 395.2466824229.

The spelling of 61745413 in words is "sixty-one million, seven hundred forty-five thousand, four hundred thirteen".