801984749 has 4 divisors (see below), whose sum is σ = 802041564. Its totient is φ = 801927936.

The previous prime is 801984739. The next prime is 801984767. The reversal of 801984749 is 947489108.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 767844100 + 34140649 = 27710^2 + 5843^2 .

It is a cyclic number.

It is not a de Polignac number, because 801984749 - 2²⁸ = 533549293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 801984697 and 801984706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801984739) 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, 10859 + ... + 41495.

It is an arithmetic number, because the mean of its divisors is an integer number (200510391).

Almost surely, 2^801984749 is an apocalyptic number.

It is an amenable number.

801984749 is a deficient number, since it is larger than the sum of its proper divisors (56815).

801984749 is a wasteful number, since it uses less digits than its factorization.

801984749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56814.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 801984749 is about 28319.3352499666. The cubic root of 801984749 is about 929.0848317917.

The spelling of 801984749 in words is "eight hundred one million, nine hundred eighty-four thousand, seven hundred forty-nine".