Search a number
30673 = 37829

30673 has 4 divisors (see below), whose sum is σ = 31540. Its totient is φ = 29808.

The previous prime is 30671. The next prime is 30677. The reversal of 30673 is 37603.

It is a happy number.

It is the 72-nd star number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37603 = 311213.

It can be written as a sum of positive squares in 2 ways, for example, as 23104 + 7569 = 152^2 + 87^2 .

It is a cyclic number.

It is not a de Polignac number, because 30673 - 21 = 30671 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 30673.

It is not an unprimeable number, because it can be changed into a prime (30671) 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, 378 + ... + 451.

It is an arithmetic number, because the mean of its divisors is an integer number (7885).

230673 is an apocalyptic number.

It is an amenable number.

30673 is a deficient number, since it is larger than the sum of its proper divisors (867).

30673 is an equidigital number, since it uses as much as digits as its factorization.

30673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866.

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 30673 is about 175.1370891616. The cubic root of 30673 is about 31.3029608607.

It can be divided in two parts, 30 and 673, that added together give a triangular number (703 = T37).

The spelling of 30673 in words is "thirty thousand, six hundred seventy-three".

Divisors: 1 37 829 30673