820903373 has 4 divisors (see below), whose sum is σ = 856594848. Its totient is φ = 785211900.

The previous prime is 820903367. The next prime is 820903381. The reversal of 820903373 is 373309028.

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 820903373 - 2⁶ = 820903309 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 (820903313) 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, 17845703 + ... + 17845748.

It is an arithmetic number, because the mean of its divisors is an integer number (214148712).

Almost surely, 2^820903373 is an apocalyptic number.

It is an amenable number.

820903373 is a deficient number, since it is larger than the sum of its proper divisors (35691475).

820903373 is a wasteful number, since it uses less digits than its factorization.

820903373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35691474.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 820903373 is about 28651.4113613972. The cubic root of 820903373 is about 936.3337549664. Note that the first 3 decimals are identical.

The spelling of 820903373 in words is "eight hundred twenty million, nine hundred three thousand, three hundred seventy-three".