823980511 has 2 divisors, whose sum is σ = 823980512. Its totient is φ = 823980510.

The previous prime is 823980503. The next prime is 823980517. The reversal of 823980511 is 115089328.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 823980511 - 2³ = 823980503 is a prime.

It is a super-2 number, since 2×823980511² = 1357887765015642242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (823980517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411990255 + 411990256.

It is an arithmetic number, because the mean of its divisors is an integer number (411990256).

Almost surely, 2^823980511 is an apocalyptic number.

823980511 is a deficient number, since it is larger than the sum of its proper divisors (1).

823980511 is an equidigital number, since it uses as much as digits as its factorization.

823980511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 823980511 is about 28705.0607210645. The cubic root of 823980511 is about 937.5022382406.

The spelling of 823980511 in words is "eight hundred twenty-three million, nine hundred eighty thousand, five hundred eleven".