690240583 has 2 divisors, whose sum is σ = 690240584. Its totient is φ = 690240582.

The previous prime is 690240547. The next prime is 690240599. The reversal of 690240583 is 385042096.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690240583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690240503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345120291 + 345120292.

It is an arithmetic number, because the mean of its divisors is an integer number (345120292).

Almost surely, 2^690240583 is an apocalyptic number.

690240583 is a deficient number, since it is larger than the sum of its proper divisors (1).

690240583 is an equidigital number, since it uses as much as digits as its factorization.

690240583 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 690240583 is about 26272.4300931604. The cubic root of 690240583 is about 883.7582820036.

The spelling of 690240583 in words is "six hundred ninety million, two hundred forty thousand, five hundred eighty-three".