691014065 has 16 divisors (see below), whose sum is σ = 950424192. Its totient is φ = 472464384.

The previous prime is 691014061. The next prime is 691014133. The reversal of 691014065 is 560410196.

It is not a de Polignac number, because 691014065 - 2² = 691014061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (691014061) 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 15 ways as a sum of consecutive naturals, for example, 16304 + ... + 40593.

It is an arithmetic number, because the mean of its divisors is an integer number (59401512).

Almost surely, 2^691014065 is an apocalyptic number.

It is an amenable number.

691014065 is a deficient number, since it is larger than the sum of its proper divisors (259410127).

691014065 is a wasteful number, since it uses less digits than its factorization.

691014065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57256.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 691014065 is about 26287.1463837367. The cubic root of 691014065 is about 884.0882712677.

The spelling of 691014065 in words is "six hundred ninety-one million, fourteen thousand, sixty-five".