801997239 has 12 divisors (see below), whose sum is σ = 1128573816. Its totient is φ = 506523888.

The previous prime is 801997223. The next prime is 801997241. The reversal of 801997239 is 932799108.

It is not a de Polignac number, because 801997239 - 2⁴ = 801997223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801997279) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 369184 + ... + 371349.

It is an arithmetic number, because the mean of its divisors is an integer number (94047818).

Almost surely, 2^801997239 is an apocalyptic number.

801997239 is a deficient number, since it is larger than the sum of its proper divisors (326576577).

801997239 is a wasteful number, since it uses less digits than its factorization.

801997239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740574 (or 740555 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 801997239 is about 28319.5557698210. Note that the first 3 decimals coincide. The cubic root of 801997239 is about 929.0896549130.

The spelling of 801997239 in words is "eight hundred one million, nine hundred ninety-seven thousand, two hundred thirty-nine".