673820997 has 16 divisors (see below), whose sum is σ = 948779520. Its totient is φ = 424191600.

The previous prime is 673820981. The next prime is 673821007. The reversal of 673820997 is 799028376.

It is not a de Polignac number, because 673820997 - 2⁴ = 673820981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673820947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1279 + ... + 36732.

It is an arithmetic number, because the mean of its divisors is an integer number (59298720).

Almost surely, 2^673820997 is an apocalyptic number.

It is an amenable number.

673820997 is a deficient number, since it is larger than the sum of its proper divisors (274958523).

673820997 is a wasteful number, since it uses less digits than its factorization.

673820997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38344.

The product of its (nonzero) digits is 1143072, while the sum is 51.

The square root of 673820997 is about 25958.0622735982. The cubic root of 673820997 is about 876.6942940848.

The spelling of 673820997 in words is "six hundred seventy-three million, eight hundred twenty thousand, nine hundred ninety-seven".