690986059 has 2 divisors, whose sum is σ = 690986060. Its totient is φ = 690986058.

The previous prime is 690986041. The next prime is 690986071. The reversal of 690986059 is 950689096.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 690986059 - 2¹¹ = 690984011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 690985997 and 690986015.

It is not a weakly prime, because it can be changed into another prime (690986459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345493029 + 345493030.

It is an arithmetic number, because the mean of its divisors is an integer number (345493030).

Almost surely, 2^690986059 is an apocalyptic number.

690986059 is a deficient number, since it is larger than the sum of its proper divisors (1).

690986059 is an equidigital number, since it uses as much as digits as its factorization.

690986059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 52.

The square root of 690986059 is about 26286.6136845353. The cubic root of 690986059 is about 884.0763274150.

It can be divided in two parts, 69098 and 6059, that added together give a palindrome (75157).

The spelling of 690986059 in words is "six hundred ninety million, nine hundred eighty-six thousand, fifty-nine".