81790702 has 12 divisors (see below), whose sum is σ = 142716600. Its totient is φ = 35053116.

The previous prime is 81790699. The next prime is 81790703. The reversal of 81790702 is 20709718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81790703) 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, 417202 + ... + 417397.

It is an arithmetic number, because the mean of its divisors is an integer number (11893050).

Almost surely, 2^81790702 is an apocalyptic number.

81790702 is a deficient number, since it is larger than the sum of its proper divisors (60925898).

81790702 is a wasteful number, since it uses less digits than its factorization.

81790702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834615 (or 834608 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 81790702 is about 9043.8212056630. The cubic root of 81790702 is about 434.0782030426.

It can be divided in two parts, 817 and 90702, that added together give a palindrome (91519).

The spelling of 81790702 in words is "eighty-one million, seven hundred ninety thousand, seven hundred two".