802147457 has 4 divisors (see below), whose sum is σ = 823827156. Its totient is φ = 780467760.

The previous prime is 802147439. The next prime is 802147481. The reversal of 802147457 is 754741208.

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 482417296 + 319730161 = 21964^2 + 17881^2 .

It is a cyclic number.

It is not a de Polignac number, because 802147457 - 2⁸ = 802147201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 802147457.

It is not an unprimeable number, because it can be changed into a prime (802107457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10839794 + ... + 10839867.

It is an arithmetic number, because the mean of its divisors is an integer number (205956789).

Almost surely, 2^802147457 is an apocalyptic number.

It is an amenable number.

802147457 is a deficient number, since it is larger than the sum of its proper divisors (21679699).

802147457 is a wasteful number, since it uses less digits than its factorization.

802147457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21679698.

The product of its (nonzero) digits is 62720, while the sum is 38.

The square root of 802147457 is about 28322.2078411977. The cubic root of 802147457 is about 929.1476589684.

The spelling of 802147457 in words is "eight hundred two million, one hundred forty-seven thousand, four hundred fifty-seven".