67920001 has 6 divisors (see below), whose sum is σ = 70343702. Its totient is φ = 65577120.

The previous prime is 67919953. The next prime is 67920007. The reversal of 67920001 is 10002976.

It can be written as a sum of positive squares in 3 ways, for example, as 5130225 + 62789776 = 2265^2 + 7924^2 .

It is a de Polignac number, because none of the positive numbers 2^k-67920001 is a prime.

It is a super-2 number, since 2×67920001² = 9226253071680002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67920007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39540 + ... + 41221.

Almost surely, 2^67920001 is an apocalyptic number.

It is an amenable number.

67920001 is a deficient number, since it is larger than the sum of its proper divisors (2423701).

67920001 is an equidigital number, since it uses as much as digits as its factorization.

67920001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80819 (or 80790 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 67920001 is about 8241.3591718842. The cubic root of 67920001 is about 408.0053844765.

Adding to 67920001 its reverse (10002976), we get a palindrome (77922977).

The spelling of 67920001 in words is "sixty-seven million, nine hundred twenty thousand, one".