81943962 has 16 divisors (see below), whose sum is σ = 164514240. Its totient is φ = 27210272.

The previous prime is 81943957. The next prime is 81943973. The reversal of 81943962 is 26934918.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24387 + ... + 27542.

It is an arithmetic number, because the mean of its divisors is an integer number (10282140).

Almost surely, 2^81943962 is an apocalyptic number.

81943962 is an abundant number, since it is smaller than the sum of its proper divisors (82570278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81943962 is a wasteful number, since it uses less digits than its factorization.

81943962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52197.

The product of its digits is 93312, while the sum is 42.

The square root of 81943962 is about 9052.2904283944. The cubic root of 81943962 is about 434.3491601488.

The spelling of 81943962 in words is "eighty-one million, nine hundred forty-three thousand, nine hundred sixty-two".