537640819 has 2 divisors, whose sum is σ = 537640820. Its totient is φ = 537640818.

The previous prime is 537640813. The next prime is 537640837. The reversal of 537640819 is 918046735.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 537640819 - 2⁵ = 537640787 is a prime.

It is a super-2 number, since 2×537640819² = 578115300509981522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (537640813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268820409 + 268820410.

It is an arithmetic number, because the mean of its divisors is an integer number (268820410).

Almost surely, 2^537640819 is an apocalyptic number.

537640819 is a deficient number, since it is larger than the sum of its proper divisors (1).

537640819 is an equidigital number, since it uses as much as digits as its factorization.

537640819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 537640819 is about 23187.0830205095. The cubic root of 537640819 is about 813.1376644365.

The spelling of 537640819 in words is "five hundred thirty-seven million, six hundred forty thousand, eight hundred nineteen".