91553141 has 2 divisors, whose sum is σ = 91553142. Its totient is φ = 91553140.

The previous prime is 91553117. The next prime is 91553171. The reversal of 91553141 is 14135519.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56400100 + 35153041 = 7510^2 + 5929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91553141 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91553171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45776570 + 45776571.

It is an arithmetic number, because the mean of its divisors is an integer number (45776571).

Almost surely, 2^91553141 is an apocalyptic number.

It is an amenable number.

91553141 is a deficient number, since it is larger than the sum of its proper divisors (1).

91553141 is an equidigital number, since it uses as much as digits as its factorization.

91553141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 29.

The square root of 91553141 is about 9568.3405562302. The cubic root of 91553141 is about 450.7036579752.

The spelling of 91553141 in words is "ninety-one million, five hundred fifty-three thousand, one hundred forty-one".