691122417 has 4 divisors (see below), whose sum is σ = 921496560. Its totient is φ = 460748276.

The previous prime is 691122389. The next prime is 691122427. The reversal of 691122417 is 714221196.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 691122417 - 2¹² = 691118321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (691122427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115187067 + ... + 115187072.

It is an arithmetic number, because the mean of its divisors is an integer number (230374140).

Almost surely, 2^691122417 is an apocalyptic number.

It is an amenable number.

691122417 is a deficient number, since it is larger than the sum of its proper divisors (230374143).

691122417 is a wasteful number, since it uses less digits than its factorization.

691122417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230374142.

The product of its digits is 6048, while the sum is 33.

The square root of 691122417 is about 26289.2072341484. The cubic root of 691122417 is about 884.1344776239.

The spelling of 691122417 in words is "six hundred ninety-one million, one hundred twenty-two thousand, four hundred seventeen".