618634 has 4 divisors (see below), whose sum is σ = 927954. Its totient is φ = 309316.

The previous prime is 618619. The next prime is 618637. The reversal of 618634 is 436816.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 363609 + 255025 = 603^2 + 505^2 .

It is not an unprimeable number, because it can be changed into a prime (618637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154657 + ... + 154660.

2⁶¹⁸⁶³⁴ is an apocalyptic number.

618634 is a deficient number, since it is larger than the sum of its proper divisors (309320).

618634 is a wasteful number, since it uses less digits than its factorization.

618634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309319.

The product of its digits is 3456, while the sum is 28.

The square root of 618634 is about 786.5328982312. The cubic root of 618634 is about 85.2075206245.

The spelling of 618634 in words is "six hundred eighteen thousand, six hundred thirty-four".