690420771 has 48 divisors (see below), whose sum is σ = 1066377312. Its totient is φ = 429811200.

The previous prime is 690420761. The next prime is 690420791. The reversal of 690420771 is 177024096.

It is a happy number.

690420771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 690420771 - 2¹⁹ = 689896483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690420761) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 840541 + ... + 841361.

It is an arithmetic number, because the mean of its divisors is an integer number (22216194).

Almost surely, 2^690420771 is an apocalyptic number.

690420771 is a deficient number, since it is larger than the sum of its proper divisors (375956541).

690420771 is a wasteful number, since it uses less digits than its factorization.

690420771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964 (or 961 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 690420771 is about 26275.8590915692. The cubic root of 690420771 is about 883.8351773096.

The spelling of 690420771 in words is "six hundred ninety million, four hundred twenty thousand, seven hundred seventy-one".