615397 has 4 divisors (see below), whose sum is σ = 618336. Its totient is φ = 612460.

The previous prime is 615389. The next prime is 615401. The reversal of 615397 is 793516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 615397 - 2³ = 615389 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 (615337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1129 + ... + 1582.

It is an arithmetic number, because the mean of its divisors is an integer number (154584).

2⁶¹⁵³⁹⁷ is an apocalyptic number.

It is an amenable number.

615397 is a deficient number, since it is larger than the sum of its proper divisors (2939).

615397 is a wasteful number, since it uses less digits than its factorization.

615397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2938.

The product of its digits is 5670, while the sum is 31.

The square root of 615397 is about 784.4724341875. The cubic root of 615397 is about 85.0586446507.

The spelling of 615397 in words is "six hundred fifteen thousand, three hundred ninety-seven".