690495489 has 48 divisors (see below), whose sum is σ = 1087996800. Its totient is φ = 431956800.

The previous prime is 690495479. The next prime is 690495493. The reversal of 690495489 is 984594096.

690495489 is a `hidden beast` number, since 6 + 90 + 4 + 9 + 548 + 9 = 666.

It is not a de Polignac number, because 690495489 - 2¹⁷ = 690364417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690495469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6334767 + ... + 6334875.

It is an arithmetic number, because the mean of its divisors is an integer number (22666600).

Almost surely, 2^690495489 is an apocalyptic number.

690495489 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

690495489 is a deficient number, since it is larger than the sum of its proper divisors (397501311).

690495489 is a wasteful number, since it uses less digits than its factorization.

690495489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The square root of 690495489 is about 26277.2808524779. The cubic root of 690495489 is about 883.8670593239.

The spelling of 690495489 in words is "six hundred ninety million, four hundred ninety-five thousand, four hundred eighty-nine".