67872491 has 2 divisors, whose sum is σ = 67872492. Its totient is φ = 67872490.

The previous prime is 67872451. The next prime is 67872509. The reversal of 67872491 is 19427876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67872491 - 2²⁶ = 763627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67872421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33936245 + 33936246.

It is an arithmetic number, because the mean of its divisors is an integer number (33936246).

Almost surely, 2^67872491 is an apocalyptic number.

67872491 is a deficient number, since it is larger than the sum of its proper divisors (1).

67872491 is an equidigital number, since it uses as much as digits as its factorization.

67872491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 67872491 is about 8238.4762547452. The cubic root of 67872491 is about 407.9102291121.

The spelling of 67872491 in words is "sixty-seven million, eight hundred seventy-two thousand, four hundred ninety-one".