801992501 has 4 divisors (see below), whose sum is σ = 823668012. Its totient is φ = 780316992.

The previous prime is 801992483. The next prime is 801992507. The reversal of 801992501 is 105299108.

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 575520100 + 226472401 = 23990^2 + 15049^2 .

It is a cyclic number.

It is not a de Polignac number, because 801992501 - 2¹⁴ = 801976117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801992507) 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, 10837700 + ... + 10837773.

It is an arithmetic number, because the mean of its divisors is an integer number (205917003).

Almost surely, 2^801992501 is an apocalyptic number.

It is an amenable number.

801992501 is a deficient number, since it is larger than the sum of its proper divisors (21675511).

801992501 is a wasteful number, since it uses less digits than its factorization.

801992501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21675510.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 801992501 is about 28319.4721172553. The cubic root of 801992501 is about 929.0878252993.

The spelling of 801992501 in words is "eight hundred one million, nine hundred ninety-two thousand, five hundred one".