80902993 has 4 divisors (see below), whose sum is σ = 80936100. Its totient is φ = 80869888.

The previous prime is 80902981. The next prime is 80903003. The reversal of 80902993 is 39920908.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29235649 + 51667344 = 5407^2 + 7188^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80902993 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80902973) 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, 12568 + ... + 17881.

It is an arithmetic number, because the mean of its divisors is an integer number (20234025).

Almost surely, 2^80902993 is an apocalyptic number.

It is an amenable number.

80902993 is a deficient number, since it is larger than the sum of its proper divisors (33107).

80902993 is a wasteful number, since it uses less digits than its factorization.

80902993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33106.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 80902993 is about 8994.6091076822. The cubic root of 80902993 is about 432.5020757917.

The spelling of 80902993 in words is "eighty million, nine hundred two thousand, nine hundred ninety-three".