67671533 has 2 divisors, whose sum is σ = 67671534. Its totient is φ = 67671532.

The previous prime is 67671517. The next prime is 67671547. The reversal of 67671533 is 33517676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55547209 + 12124324 = 7453^2 + 3482^2 .

It is a cyclic number.

It is not a de Polignac number, because 67671533 - 2⁴ = 67671517 is a prime.

It is a Chen prime.

It is equal to p_3989108 and since 67671533 and 3989108 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67671503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33835766 + 33835767.

It is an arithmetic number, because the mean of its divisors is an integer number (33835767).

Almost surely, 2^67671533 is an apocalyptic number.

It is an amenable number.

67671533 is a deficient number, since it is larger than the sum of its proper divisors (1).

67671533 is an equidigital number, since it uses as much as digits as its factorization.

67671533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 38.

The square root of 67671533 is about 8226.2709048511. The cubic root of 67671533 is about 407.5072486698.

The spelling of 67671533 in words is "sixty-seven million, six hundred seventy-one thousand, five hundred thirty-three".