690462823 has 2 divisors, whose sum is σ = 690462824. Its totient is φ = 690462822.

The previous prime is 690462821. The next prime is 690462833. The reversal of 690462823 is 328264096.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690462823 - 2¹ = 690462821 is a prime.

Together with 690462821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690462821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345231411 + 345231412.

It is an arithmetic number, because the mean of its divisors is an integer number (345231412).

Almost surely, 2^690462823 is an apocalyptic number.

690462823 is a deficient number, since it is larger than the sum of its proper divisors (1).

690462823 is an equidigital number, since it uses as much as digits as its factorization.

690462823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 690462823 is about 26276.6592815754. The cubic root of 690462823 is about 883.8531210930.

The spelling of 690462823 in words is "six hundred ninety million, four hundred sixty-two thousand, eight hundred twenty-three".