67540001 has 2 divisors, whose sum is σ = 67540002. Its totient is φ = 67540000.

The previous prime is 67539973. The next prime is 67540007. The reversal of 67540001 is 10004576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57395776 + 10144225 = 7576^2 + 3185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67540001 is a prime.

It is not a weakly prime, because it can be changed into another prime (67540007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33770000 + 33770001.

It is an arithmetic number, because the mean of its divisors is an integer number (33770001).

Almost surely, 2^67540001 is an apocalyptic number.

It is an amenable number.

67540001 is a deficient number, since it is larger than the sum of its proper divisors (1).

67540001 is an equidigital number, since it uses as much as digits as its factorization.

67540001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 67540001 is about 8218.2723853618. The cubic root of 67540001 is about 407.2430558061.

Adding to 67540001 its reverse (10004576), we get a palindrome (77544577).

The spelling of 67540001 in words is "sixty-seven million, five hundred forty thousand, one".