691429385 has 8 divisors (see below), whose sum is σ = 830109120. Its totient is φ = 552880944.

The previous prime is 691429351. The next prime is 691429411. The reversal of 691429385 is 583924196.

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

It is a cyclic number.

It is not a de Polignac number, because 691429385 - 2¹² = 691425289 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 20837 + ... + 42626.

It is an arithmetic number, because the mean of its divisors is an integer number (103763640).

Almost surely, 2^691429385 is an apocalyptic number.

It is an amenable number.

691429385 is a deficient number, since it is larger than the sum of its proper divisors (138679735).

691429385 is a wasteful number, since it uses less digits than its factorization.

691429385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65647.

The product of its digits is 466560, while the sum is 47.

The square root of 691429385 is about 26295.0448754133. The cubic root of 691429385 is about 884.2653569075.

The spelling of 691429385 in words is "six hundred ninety-one million, four hundred twenty-nine thousand, three hundred eighty-five".