615389 has 2 divisors, whose sum is σ = 615390. Its totient is φ = 615388.

The previous prime is 615379. The next prime is 615401. The reversal of 615389 is 983516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 348100 + 267289 = 590^2 + 517^2 .

It is a cyclic number.

It is not a de Polignac number, because 615389 - 2¹² = 611293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (615379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307694 + 307695.

It is an arithmetic number, because the mean of its divisors is an integer number (307695).

2⁶¹⁵³⁸⁹ is an apocalyptic number.

It is an amenable number.

615389 is a deficient number, since it is larger than the sum of its proper divisors (1).

615389 is an equidigital number, since it uses as much as digits as its factorization.

615389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 615389 is about 784.4673352027. The cubic root of 615389 is about 85.0582760690.

The spelling of 615389 in words is "six hundred fifteen thousand, three hundred eighty-nine".