690706997 has 8 divisors (see below), whose sum is σ = 724515840. Its totient is φ = 657213040.

The previous prime is 690706969. The next prime is 690706999. The reversal of 690706997 is 799607096.

690706997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 690706997 - 2⁸ = 690706741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690706999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74222 + ... + 83007.

It is an arithmetic number, because the mean of its divisors is an integer number (90564480).

Almost surely, 2^690706997 is an apocalyptic number.

It is an amenable number.

690706997 is a deficient number, since it is larger than the sum of its proper divisors (33808843).

690706997 is a wasteful number, since it uses less digits than its factorization.

690706997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157443.

The product of its (nonzero) digits is 1285956, while the sum is 53.

The square root of 690706997 is about 26281.3050855546. The cubic root of 690706997 is about 883.9572968766.

It can be divided in two parts, 69070 and 6997, that added together give a palindrome (76067).

The spelling of 690706997 in words is "six hundred ninety million, seven hundred six thousand, nine hundred ninety-seven".