690960493 has 8 divisors (see below), whose sum is σ = 699710616. Its totient is φ = 682248000.

The previous prime is 690960451. The next prime is 690960497. The reversal of 690960493 is 394069096.

It can be written as a sum of positive squares in 4 ways, for example, as 145878084 + 545082409 = 12078^2 + 23347^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 690960493 - 2¹⁷ = 690829421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690960497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28503 + ... + 46843.

It is an arithmetic number, because the mean of its divisors is an integer number (87463827).

Almost surely, 2^690960493 is an apocalyptic number.

It is an amenable number.

690960493 is a deficient number, since it is larger than the sum of its proper divisors (8750123).

690960493 is a wasteful number, since it uses less digits than its factorization.

690960493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18815.

The product of its (nonzero) digits is 314928, while the sum is 46.

The square root of 690960493 is about 26286.1273868936. The cubic root of 690960493 is about 884.0654238790.

The spelling of 690960493 in words is "six hundred ninety million, nine hundred sixty thousand, four hundred ninety-three".