94331981 has 16 divisors (see below), whose sum is σ = 99958848. Its totient is φ = 88905600.

The previous prime is 94331957. The next prime is 94331989. The reversal of 94331981 is 18913349.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 94331981 - 2¹⁸ = 94069837 is a prime.

It is a super-2 number, since 2×94331981² = 17797045278768722, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 94331981 parts by 13735 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (94331989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335561 + ... + 335841.

It is an arithmetic number, because the mean of its divisors is an integer number (6247428).

Almost surely, 2^94331981 is an apocalyptic number.

It is an amenable number.

94331981 is a deficient number, since it is larger than the sum of its proper divisors (5626867).

94331981 is a wasteful number, since it uses less digits than its factorization.

94331981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572.

The product of its digits is 23328, while the sum is 38.

The square root of 94331981 is about 9712.4652380330. The cubic root of 94331981 is about 455.2182360887.

The spelling of 94331981 in words is "ninety-four million, three hundred thirty-one thousand, nine hundred eighty-one".