93937981 has 2 divisors, whose sum is σ = 93937982. Its totient is φ = 93937980.

The previous prime is 93937973. The next prime is 93937997. The reversal of 93937981 is 18973939.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93915481 + 22500 = 9691^2 + 150^2 .

It is a cyclic number.

It is not a de Polignac number, because 93937981 - 2³ = 93937973 is a prime.

It is a super-2 number, since 2×93937981² = 17648688548712722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93932981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46968990 + 46968991.

It is an arithmetic number, because the mean of its divisors is an integer number (46968991).

Almost surely, 2^93937981 is an apocalyptic number.

It is an amenable number.

93937981 is a deficient number, since it is larger than the sum of its proper divisors (1).

93937981 is an equidigital number, since it uses as much as digits as its factorization.

93937981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 49.

The square root of 93937981 is about 9692.1608013900. The cubic root of 93937981 is about 454.5835758464.

The spelling of 93937981 in words is "ninety-three million, nine hundred thirty-seven thousand, nine hundred eighty-one".