801653 has 4 divisors (see below), whose sum is σ = 804300. Its totient is φ = 799008.

The previous prime is 801641. The next prime is 801677. The reversal of 801653 is 356108.

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 485809 + 315844 = 697^2 + 562^2 .

It is a cyclic number.

It is not a de Polignac number, because 801653 - 2¹² = 797557 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801683) 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, 800 + ... + 1497.

It is an arithmetic number, because the mean of its divisors is an integer number (201075).

2⁸⁰¹⁶⁵³ is an apocalyptic number.

It is an amenable number.

801653 is a deficient number, since it is larger than the sum of its proper divisors (2647).

801653 is a wasteful number, since it uses less digits than its factorization.

801653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 801653 is about 895.3507692519. The cubic root of 801653 is about 92.8956705717.

The spelling of 801653 in words is "eight hundred one thousand, six hundred fifty-three".