405879611 has 2 divisors, whose sum is σ = 405879612. Its totient is φ = 405879610.

The previous prime is 405879589. The next prime is 405879619. The reversal of 405879611 is 116978504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405879611 - 2⁶ = 405879547 is a prime.

It is a super-2 number, since 2×405879611² = 329476517251022642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (405879619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202939805 + 202939806.

It is an arithmetic number, because the mean of its divisors is an integer number (202939806).

Almost surely, 2^405879611 is an apocalyptic number.

405879611 is a deficient number, since it is larger than the sum of its proper divisors (1).

405879611 is an equidigital number, since it uses as much as digits as its factorization.

405879611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 405879611 is about 20146.4540552426. The cubic root of 405879611 is about 740.3988664152.

The spelling of 405879611 in words is "four hundred five million, eight hundred seventy-nine thousand, six hundred eleven".