690240919 has 16 divisors (see below), whose sum is σ = 772156800. Its totient is φ = 613871104.

The previous prime is 690240869. The next prime is 690240931. The reversal of 690240919 is 919042096.

690240919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 690240919 - 2⁷ = 690240791 is a prime.

It is a super-2 number, since 2×690240919² = 952865052523929122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690240989) 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, 8277 + ... + 38065.

It is an arithmetic number, because the mean of its divisors is an integer number (48259800).

Almost surely, 2^690240919 is an apocalyptic number.

690240919 is a deficient number, since it is larger than the sum of its proper divisors (81915881).

690240919 is a wasteful number, since it uses less digits than its factorization.

690240919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29882.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 690240919 is about 26272.4364876956. The cubic root of 690240919 is about 883.7584254042.

The spelling of 690240919 in words is "six hundred ninety million, two hundred forty thousand, nine hundred nineteen".