672990819 has 4 divisors (see below), whose sum is σ = 897321096. Its totient is φ = 448660544.

The previous prime is 672990803. The next prime is 672990839. The reversal of 672990819 is 918099276.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 672990819 - 2⁴ = 672990803 is a prime.

It is a super-2 number, since 2×672990819² = 905833284916581522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (672990839) 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, 112165134 + ... + 112165139.

It is an arithmetic number, because the mean of its divisors is an integer number (224330274).

Almost surely, 2^672990819 is an apocalyptic number.

672990819 is a deficient number, since it is larger than the sum of its proper divisors (224330277).

672990819 is a wasteful number, since it uses less digits than its factorization.

672990819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224330276.

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 672990819 is about 25942.0665907711. The cubic root of 672990819 is about 876.3341037559.

The spelling of 672990819 in words is "six hundred seventy-two million, nine hundred ninety thousand, eight hundred nineteen".