690784493 has 8 divisors (see below), whose sum is σ = 790495488. Its totient is φ = 591330384.

The previous prime is 690784459. The next prime is 690784513. The reversal of 690784493 is 394487096.

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 690784493 - 2¹⁰ = 690783469 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 (690784693) 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, 58421 + ... + 69242.

It is an arithmetic number, because the mean of its divisors is an integer number (98811936).

Almost surely, 2^690784493 is an apocalyptic number.

It is an amenable number.

690784493 is a deficient number, since it is larger than the sum of its proper divisors (99710995).

690784493 is a wasteful number, since it uses less digits than its factorization.

690784493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128443.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 690784493 is about 26282.7794002080. The cubic root of 690784493 is about 883.9903550779.

The spelling of 690784493 in words is "six hundred ninety million, seven hundred eighty-four thousand, four hundred ninety-three".