802143649 has 4 divisors (see below), whose sum is σ = 803078320. Its totient is φ = 801208980.

The previous prime is 802143647. The next prime is 802143659. The reversal of 802143649 is 946341208.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 802143649 - 2¹ = 802143647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (802143647) 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, 466047 + ... + 467764.

It is an arithmetic number, because the mean of its divisors is an integer number (200769580).

Almost surely, 2^802143649 is an apocalyptic number.

It is an amenable number.

802143649 is a deficient number, since it is larger than the sum of its proper divisors (934671).

802143649 is an equidigital number, since it uses as much as digits as its factorization.

802143649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934670.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 802143649 is about 28322.1406147205. The cubic root of 802143649 is about 929.1461886653.

The spelling of 802143649 in words is "eight hundred two million, one hundred forty-three thousand, six hundred forty-nine".