691446001 has 2 divisors, whose sum is σ = 691446002. Its totient is φ = 691446000.

The previous prime is 691445971. The next prime is 691446011. The reversal of 691446001 is 100644196.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 643129600 + 48316401 = 25360^2 + 6951^2 .

It is a cyclic number.

It is not a de Polignac number, because 691446001 - 2¹³ = 691437809 is a prime.

It is equal to p_35833009 and since 691446001 and 35833009 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (691446011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345723000 + 345723001.

It is an arithmetic number, because the mean of its divisors is an integer number (345723001).

Almost surely, 2^691446001 is an apocalyptic number.

It is an amenable number.

691446001 is a deficient number, since it is larger than the sum of its proper divisors (1).

691446001 is an equidigital number, since it uses as much as digits as its factorization.

691446001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 691446001 is about 26295.3608265793. The cubic root of 691446001 is about 884.2724402221.

The spelling of 691446001 in words is "six hundred ninety-one million, four hundred forty-six thousand, one".