59143991 has 2 divisors, whose sum is σ = 59143992. Its totient is φ = 59143990.

The previous prime is 59143967. The next prime is 59143993. The reversal of 59143991 is 19934195.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-59143991 is a prime.

Together with 59143993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (59143993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29571995 + 29571996.

It is an arithmetic number, because the mean of its divisors is an integer number (29571996).

Almost surely, 2^59143991 is an apocalyptic number.

59143991 is a deficient number, since it is larger than the sum of its proper divisors (1).

59143991 is an equidigital number, since it uses as much as digits as its factorization.

59143991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 41.

The square root of 59143991 is about 7690.5130518061. The cubic root of 59143991 is about 389.6160828567.

The spelling of 59143991 in words is "fifty-nine million, one hundred forty-three thousand, nine hundred ninety-one".