802158993 has 6 divisors (see below), whose sum is σ = 1158674114. Its totient is φ = 534772656.

The previous prime is 802158989. The next prime is 802159003. The reversal of 802158993 is 399851208.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 613453824 + 188705169 = 24768^2 + 13737^2 .

It is not a de Polignac number, because 802158993 - 2² = 802158989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (802158943) 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, 44564380 + ... + 44564397.

Almost surely, 2^802158993 is an apocalyptic number.

It is an amenable number.

802158993 is a deficient number, since it is larger than the sum of its proper divisors (356515121).

802158993 is a wasteful number, since it uses less digits than its factorization.

802158993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89128783 (or 89128780 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 802158993 is about 28322.4114969047. The cubic root of 802158993 is about 929.1521130938.

The spelling of 802158993 in words is "eight hundred two million, one hundred fifty-eight thousand, nine hundred ninety-three".