81702002 has 8 divisors (see below), whose sum is σ = 123019776. Its totient is φ = 40695412.

The previous prime is 81702001. The next prime is 81702013. The reversal of 81702002 is 20020718.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (81702001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77138 + ... + 78189.

It is an arithmetic number, because the mean of its divisors is an integer number (15377472).

Almost surely, 2^81702002 is an apocalyptic number.

81702002 is a deficient number, since it is larger than the sum of its proper divisors (41317774).

81702002 is a wasteful number, since it uses less digits than its factorization.

81702002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155592.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 81702002 is about 9038.9159748280. The cubic root of 81702002 is about 433.9212305812.

It can be divided in two parts, 8170 and 2002, that multiplied together give a triangular number (16356340 = T₅₇₁₉).

The spelling of 81702002 in words is "eighty-one million, seven hundred two thousand, two".