617138 has 4 divisors (see below), whose sum is σ = 925710. Its totient is φ = 308568.

The previous prime is 617131. The next prime is 617147. The reversal of 617138 is 831716.

617138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 582169 + 34969 = 763^2 + 187^2 .

It is a super-2 number, since 2×617138² = 761718622088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (617131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154283 + ... + 154286.

2⁶¹⁷¹³⁸ is an apocalyptic number.

617138 is a deficient number, since it is larger than the sum of its proper divisors (308572).

617138 is a wasteful number, since it uses less digits than its factorization.

617138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308571.

The product of its digits is 1008, while the sum is 26.

The square root of 617138 is about 785.5813134234. The cubic root of 617138 is about 85.1387813591.

The spelling of 617138 in words is "six hundred seventeen thousand, one hundred thirty-eight".