802785149 has 4 divisors (see below), whose sum is σ = 804121500. Its totient is φ = 801448800.

The previous prime is 802785127. The next prime is 802785241. The reversal of 802785149 is 941587208.

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 683822500 + 118962649 = 26150^2 + 10907^2 .

It is a cyclic number.

It is not a de Polignac number, because 802785149 - 2¹⁶ = 802719613 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 (802785119) 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, 667274 + ... + 668475.

It is an arithmetic number, because the mean of its divisors is an integer number (201030375).

Almost surely, 2^802785149 is an apocalyptic number.

It is an amenable number.

802785149 is a deficient number, since it is larger than the sum of its proper divisors (1336351).

802785149 is a wasteful number, since it uses less digits than its factorization.

802785149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336350.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 802785149 is about 28333.4634134269. The cubic root of 802785149 is about 929.3938120008.

The spelling of 802785149 in words is "eight hundred two million, seven hundred eighty-five thousand, one hundred forty-nine".