93355981 has 2 divisors, whose sum is σ = 93355982. Its totient is φ = 93355980.

The previous prime is 93355979. The next prime is 93356009. The reversal of 93355981 is 18955339.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75429225 + 17926756 = 8685^2 + 4234^2 .

It is a cyclic number.

It is not a de Polignac number, because 93355981 - 2¹ = 93355979 is a prime.

It is a super-2 number, since 2×93355981² = 17430678376944722, which contains 22 as substring.

Together with 93355979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93355961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46677990 + 46677991.

It is an arithmetic number, because the mean of its divisors is an integer number (46677991).

Almost surely, 2^93355981 is an apocalyptic number.

It is an amenable number.

93355981 is a deficient number, since it is larger than the sum of its proper divisors (1).

93355981 is an equidigital number, since it uses as much as digits as its factorization.

93355981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 43.

The square root of 93355981 is about 9662.0898878038. The cubic root of 93355981 is about 453.6428278130.

The spelling of 93355981 in words is "ninety-three million, three hundred fifty-five thousand, nine hundred eighty-one".