820499974 has 8 divisors (see below), whose sum is σ = 1406571408. Its totient is φ = 351642840.

The previous prime is 820499963. The next prime is 820499983. The reversal of 820499974 is 479994028.

It is a happy number.

820499974 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29303557 + ... + 29303584.

It is an arithmetic number, because the mean of its divisors is an integer number (175821426).

Almost surely, 2^820499974 is an apocalyptic number.

820499974 is a deficient number, since it is larger than the sum of its proper divisors (586071434).

820499974 is a wasteful number, since it uses less digits than its factorization.

820499974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58607150.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 820499974 is about 28644.3707209637. The cubic root of 820499974 is about 936.1803556745.

The spelling of 820499974 in words is "eight hundred twenty million, four hundred ninety-nine thousand, nine hundred seventy-four".