820134374 has 4 divisors (see below), whose sum is σ = 1230201564. Its totient is φ = 410067186.

The previous prime is 820134361. The next prime is 820134389. The reversal of 820134374 is 473431028.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 820134374.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205033592 + ... + 205033595.

It is an arithmetic number, because the mean of its divisors is an integer number (307550391).

Almost surely, 2^820134374 is an apocalyptic number.

820134374 is a deficient number, since it is larger than the sum of its proper divisors (410067190).

820134374 is a wasteful number, since it uses less digits than its factorization.

820134374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410067189.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 820134374 is about 28637.9883022534. The cubic root of 820134374 is about 936.0412866525.

The spelling of 820134374 in words is "eight hundred twenty million, one hundred thirty-four thousand, three hundred seventy-four".