690355019 has 2 divisors, whose sum is σ = 690355020. Its totient is φ = 690355018.

The previous prime is 690355013. The next prime is 690355031. The reversal of 690355019 is 910553096.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690355019 - 2²⁴ = 673577803 is a prime.

It is a super-2 number, since 2×690355019² = 953180104516980722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (690355013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345177509 + 345177510.

It is an arithmetic number, because the mean of its divisors is an integer number (345177510).

Almost surely, 2^690355019 is an apocalyptic number.

690355019 is a deficient number, since it is larger than the sum of its proper divisors (1).

690355019 is an equidigital number, since it uses as much as digits as its factorization.

690355019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 690355019 is about 26274.6078752852. The cubic root of 690355019 is about 883.8071191659.

The spelling of 690355019 in words is "six hundred ninety million, three hundred fifty-five thousand, nineteen".