673440437 has 4 divisors (see below), whose sum is σ = 702720480. Its totient is φ = 644160396.

The previous prime is 673440433. The next prime is 673440451. The reversal of 673440437 is 734044376.

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 673440437 - 2² = 673440433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 673440437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673440433) 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, 14639987 + ... + 14640032.

It is an arithmetic number, because the mean of its divisors is an integer number (175680120).

Almost surely, 2^673440437 is an apocalyptic number.

It is an amenable number.

673440437 is a deficient number, since it is larger than the sum of its proper divisors (29280043).

673440437 is a wasteful number, since it uses less digits than its factorization.

673440437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29280042.

The product of its (nonzero) digits is 169344, while the sum is 38.

The square root of 673440437 is about 25950.7309530965. The cubic root of 673440437 is about 876.5292168058.

The spelling of 673440437 in words is "six hundred seventy-three million, four hundred forty thousand, four hundred thirty-seven".