690101297 has 4 divisors (see below), whose sum is σ = 690202740. Its totient is φ = 689999856.

The previous prime is 690101249. The next prime is 690101317. The reversal of 690101297 is 792101096.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7376656 + 682724641 = 2716^2 + 26129^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690101297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690100297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39722 + ... + 54387.

It is an arithmetic number, because the mean of its divisors is an integer number (172550685).

Almost surely, 2^690101297 is an apocalyptic number.

It is an amenable number.

690101297 is a deficient number, since it is larger than the sum of its proper divisors (101443).

690101297 is an equidigital number, since it uses as much as digits as its factorization.

690101297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101442.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 690101297 is about 26269.7791578079. The cubic root of 690101297 is about 883.6988324725.

It can be divided in two parts, 69010 and 1297, that added together give a palindrome (70307).

The spelling of 690101297 in words is "six hundred ninety million, one hundred one thousand, two hundred ninety-seven".