690533273 has 2 divisors, whose sum is σ = 690533274. Its totient is φ = 690533272.

The previous prime is 690533243. The next prime is 690533287. The reversal of 690533273 is 372335096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 685811344 + 4721929 = 26188^2 + 2173^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690533273 is a prime.

It is a super-2 number, since 2×690533273² = 953672402240185058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (690533243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345266636 + 345266637.

It is an arithmetic number, because the mean of its divisors is an integer number (345266637).

Almost surely, 2^690533273 is an apocalyptic number.

It is an amenable number.

690533273 is a deficient number, since it is larger than the sum of its proper divisors (1).

690533273 is an equidigital number, since it uses as much as digits as its factorization.

690533273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 38.

The square root of 690533273 is about 26277.9997906994. Note that the first 3 decimals coincide. The cubic root of 690533273 is about 883.8831808020.

The spelling of 690533273 in words is "six hundred ninety million, five hundred thirty-three thousand, two hundred seventy-three".