615949 has 2 divisors, whose sum is σ = 615950. Its totient is φ = 615948.

The previous prime is 615941. The next prime is 615971. The reversal of 615949 is 949516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 413449 + 202500 = 643^2 + 450^2 .

It is a cyclic number.

It is not a de Polignac number, because 615949 - 2³ = 615941 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (615941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307974 + 307975.

It is an arithmetic number, because the mean of its divisors is an integer number (307975).

2⁶¹⁵⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

615949 is a deficient number, since it is larger than the sum of its proper divisors (1).

615949 is an equidigital number, since it uses as much as digits as its factorization.

615949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 615949 is about 784.8241841330. The cubic root of 615949 is about 85.0840690734.

The spelling of 615949 in words is "six hundred fifteen thousand, nine hundred forty-nine".