690531184997 has 2 divisors, whose sum is σ = 690531184998. Its totient is φ = 690531184996.

The previous prime is 690531184991. The next prime is 690531185053. The reversal of 690531184997 is 799481135096.

690531184997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 647500246276 + 43030938721 = 804674^2 + 207439^2 .

It is a cyclic number.

It is not a de Polignac number, because 690531184997 - 2¹² = 690531180901 is a prime.

It is a super-2 number, since 2×690531184997² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690531184991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345265592498 + 345265592499.

It is an arithmetic number, because the mean of its divisors is an integer number (345265592499).

Almost surely, 2^690531184997 is an apocalyptic number.

It is an amenable number.

690531184997 is a deficient number, since it is larger than the sum of its proper divisors (1).

690531184997 is an equidigital number, since it uses as much as digits as its factorization.

690531184997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14696640, while the sum is 62.

The spelling of 690531184997 in words is "six hundred ninety billion, five hundred thirty-one million, one hundred eighty-four thousand, nine hundred ninety-seven".