690497271 has 16 divisors (see below), whose sum is σ = 1032894720. Its totient is φ = 455860440.

The previous prime is 690497267. The next prime is 690497281. The reversal of 690497271 is 172794096.

690497271 is a `hidden beast` number, since 6 + 90 + 497 + 2 + 71 = 666.

690497271 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 690497271 - 2² = 690497267 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690497251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121365 + ... + 126926.

It is an arithmetic number, because the mean of its divisors is an integer number (64555920).

Almost surely, 2^690497271 is an apocalyptic number.

690497271 is a deficient number, since it is larger than the sum of its proper divisors (342397449).

690497271 is a wasteful number, since it uses less digits than its factorization.

690497271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248403 (or 248397 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 690497271 is about 26277.3147600739. The cubic root of 690497271 is about 883.8678196715.

The spelling of 690497271 in words is "six hundred ninety million, four hundred ninety-seven thousand, two hundred seventy-one".