551690569 has 2 divisors, whose sum is σ = 551690570. Its totient is φ = 551690568.

The previous prime is 551690563. The next prime is 551690611. The reversal of 551690569 is 965096155.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 455395600 + 96294969 = 21340^2 + 9813^2 .

It is a cyclic number.

It is not a de Polignac number, because 551690569 - 2³ = 551690561 is a prime.

It is a super-2 number, since 2×551690569² = 608724967847087522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (551690561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275845284 + 275845285.

It is an arithmetic number, because the mean of its divisors is an integer number (275845285).

Almost surely, 2^551690569 is an apocalyptic number.

It is an amenable number.

551690569 is a deficient number, since it is larger than the sum of its proper divisors (1).

551690569 is an equidigital number, since it uses as much as digits as its factorization.

551690569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 364500, while the sum is 46.

The square root of 551690569 is about 23488.0941968479. The cubic root of 551690569 is about 820.1598781062.

The spelling of 551690569 in words is "five hundred fifty-one million, six hundred ninety thousand, five hundred sixty-nine".