690809411 has 2 divisors, whose sum is σ = 690809412. Its totient is φ = 690809410.

The previous prime is 690809401. The next prime is 690809477. The reversal of 690809411 is 114908096.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690809411 - 2¹⁴ = 690793027 is a prime.

It is not a weakly prime, because it can be changed into another prime (690809401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345404705 + 345404706.

It is an arithmetic number, because the mean of its divisors is an integer number (345404706).

Almost surely, 2^690809411 is an apocalyptic number.

690809411 is a deficient number, since it is larger than the sum of its proper divisors (1).

690809411 is an equidigital number, since it uses as much as digits as its factorization.

690809411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 690809411 is about 26283.2534325566. The cubic root of 690809411 is about 884.0009840594. Note that the first 3 decimals are identical.

The spelling of 690809411 in words is "six hundred ninety million, eight hundred nine thousand, four hundred eleven".