81943362 has 12 divisors (see below), whose sum is σ = 177543990. Its totient is φ = 27314448.

The previous prime is 81943331. The next prime is 81943363. The reversal of 81943362 is 26334918.

It can be written as a sum of positive squares in only one way, i.e., 46908801 + 35034561 = 6849^2 + 5919^2 .

It is not an unprimeable number, because it can be changed into a prime (81943363) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2276187 + ... + 2276222.

Almost surely, 2^81943362 is an apocalyptic number.

81943362 is an abundant number, since it is smaller than the sum of its proper divisors (95600628).

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

81943362 is a wasteful number, since it uses less digits than its factorization.

81943362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4552417 (or 4552414 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 81943362 is about 9052.2572875499. The cubic root of 81943362 is about 434.3481000335.

The spelling of 81943362 in words is "eighty-one million, nine hundred forty-three thousand, three hundred sixty-two".