515969423 has 2 divisors, whose sum is σ = 515969424. Its totient is φ = 515969422.

The previous prime is 515969381. The next prime is 515969429. The reversal of 515969423 is 324969515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 515969423 - 2¹² = 515965327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515969429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257984711 + 257984712.

It is an arithmetic number, because the mean of its divisors is an integer number (257984712).

Almost surely, 2^515969423 is an apocalyptic number.

515969423 is a deficient number, since it is larger than the sum of its proper divisors (1).

515969423 is an equidigital number, since it uses as much as digits as its factorization.

515969423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 44.

The square root of 515969423 is about 22714.9603345460. The cubic root of 515969423 is about 802.0620879870.

The spelling of 515969423 in words is "five hundred fifteen million, nine hundred sixty-nine thousand, four hundred twenty-three".