673840537 has 4 divisors (see below), whose sum is σ = 679146496. Its totient is φ = 668534580.

The previous prime is 673840513. The next prime is 673840547. The reversal of 673840537 is 735048376.

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 673840537 - 2¹¹ = 673838489 is a prime.

It is a super-2 number, since 2×673840537² = 908122138608896738, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 673840493 and 673840502.

It is not an unprimeable number, because it can be changed into a prime (673840547) 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, 2652789 + ... + 2653042.

It is an arithmetic number, because the mean of its divisors is an integer number (169786624).

Almost surely, 2^673840537 is an apocalyptic number.

It is an amenable number.

673840537 is a deficient number, since it is larger than the sum of its proper divisors (5305959).

673840537 is a wasteful number, since it uses less digits than its factorization.

673840537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305958.

The product of its (nonzero) digits is 423360, while the sum is 43.

The square root of 673840537 is about 25958.4386471914. The cubic root of 673840537 is about 876.7027683636.

The spelling of 673840537 in words is "six hundred seventy-three million, eight hundred forty thousand, five hundred thirty-seven".