345637 has 2 divisors, whose sum is σ = 345638. Its totient is φ = 345636.

The previous prime is 345607. The next prime is 345643. The reversal of 345637 is 736543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320356 + 25281 = 566^2 + 159^2 .

It is a cyclic number.

It is not a de Polignac number, because 345637 - 2¹¹ = 343589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345607) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172818 + 172819.

It is an arithmetic number, because the mean of its divisors is an integer number (172819).

2³⁴⁵⁶³⁷ is an apocalyptic number.

It is an amenable number.

345637 is a deficient number, since it is larger than the sum of its proper divisors (1).

345637 is an equidigital number, since it uses as much as digits as its factorization.

345637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 28.

The square root of 345637 is about 587.9090065648. The cubic root of 345637 is about 70.1789299948.

It can be divided in two parts, 34 and 5637, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 345637 in words is "three hundred forty-five thousand, six hundred thirty-seven".