690452019 has 20 divisors (see below), whose sum is σ = 1076263056. Its totient is φ = 440287056.

The previous prime is 690451997. The next prime is 690452023. The reversal of 690452019 is 910254096.

It is not a de Polignac number, because 690452019 - 2⁵ = 690451987 is a prime.

It is a super-2 number, since 2×690452019² = 953447981082352722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (690452069) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 183444 + ... + 187169.

Almost surely, 2^690452019 is an apocalyptic number.

690452019 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

690452019 is a deficient number, since it is larger than the sum of its proper divisors (385811037).

690452019 is a wasteful number, since it uses less digits than its factorization.

690452019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370648 (or 370639 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 690452019 is about 26276.4536990820. The cubic root of 690452019 is about 883.8485110456.

The spelling of 690452019 in words is "six hundred ninety million, four hundred fifty-two thousand, nineteen".