59981813 has 2 divisors, whose sum is σ = 59981814. Its totient is φ = 59981812.

The previous prime is 59981791. The next prime is 59981821. The reversal of 59981813 is 31818995.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42484324 + 17497489 = 6518^2 + 4183^2 .

It is a cyclic number.

It is not a de Polignac number, because 59981813 - 2⁶ = 59981749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (59981833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29990906 + 29990907.

It is an arithmetic number, because the mean of its divisors is an integer number (29990907).

Almost surely, 2^59981813 is an apocalyptic number.

It is an amenable number.

59981813 is a deficient number, since it is larger than the sum of its proper divisors (1).

59981813 is an equidigital number, since it uses as much as digits as its factorization.

59981813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 44.

The square root of 59981813 is about 7744.7926376372. The cubic root of 59981813 is about 391.4472047319.

The spelling of 59981813 in words is "fifty-nine million, nine hundred eighty-one thousand, eight hundred thirteen".