690942729 has 8 divisors (see below), whose sum is σ = 927885280. Its totient is φ = 457314336.

The previous prime is 690942727. The next prime is 690942739. The reversal of 690942729 is 927249096.

690942729 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 690942729 - 2¹ = 690942727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690942727) 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, 828052 + ... + 828885.

It is an arithmetic number, because the mean of its divisors is an integer number (115985660).

Almost surely, 2^690942729 is an apocalyptic number.

It is an amenable number.

690942729 is a deficient number, since it is larger than the sum of its proper divisors (236942551).

690942729 is a wasteful number, since it uses less digits than its factorization.

690942729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657079.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 690942729 is about 26285.7894878583. The cubic root of 690942729 is about 884.0578476269.

The spelling of 690942729 in words is "six hundred ninety million, nine hundred forty-two thousand, seven hundred twenty-nine".