615493 has 2 divisors, whose sum is σ = 615494. Its totient is φ = 615492.

The previous prime is 615491. The next prime is 615497. The reversal of 615493 is 394516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 611524 + 3969 = 782^2 + 63^2 .

It is a cyclic number.

It is not a de Polignac number, because 615493 - 2¹ = 615491 is a prime.

Together with 615491, it forms a pair of twin primes.

615493 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (615491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307746 + 307747.

It is an arithmetic number, because the mean of its divisors is an integer number (307747).

2⁶¹⁵⁴⁹³ is an apocalyptic number.

It is an amenable number.

615493 is a deficient number, since it is larger than the sum of its proper divisors (1).

615493 is an equidigital number, since it uses as much as digits as its factorization.

615493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 615493 is about 784.5336194198. The cubic root of 615493 is about 85.0630673812.

The spelling of 615493 in words is "six hundred fifteen thousand, four hundred ninety-three".