673551 has 12 divisors (see below), whose sum is σ = 988312. Its totient is φ = 441936.

The previous prime is 673549. The next prime is 673553. The reversal of 673551 is 155376.

673551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (673549) and next prime (673553).

It is not a de Polignac number, because 673551 - 2¹ = 673549 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 (673553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45 + ... + 1161.

2⁶⁷³⁵⁵¹ is an apocalyptic number.

673551 is a deficient number, since it is larger than the sum of its proper divisors (314761).

673551 is a wasteful number, since it uses less digits than its factorization.

673551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190 (or 1187 counting only the distinct ones).

The product of its digits is 3150, while the sum is 27.

The square root of 673551 is about 820.7015291810. The cubic root of 673551 is about 87.6577182640.

It can be divided in two parts, 6735 and 51, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 673551 in words is "six hundred seventy-three thousand, five hundred fifty-one".