67528971 has 12 divisors (see below), whose sum is σ = 101154872. Its totient is φ = 45019152.

The previous prime is 67528957. The next prime is 67528987. The reversal of 67528971 is 17982576.

It is not a de Polignac number, because 67528971 - 2⁵ = 67528939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67528921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138706 + ... + 139191.

Almost surely, 2^67528971 is an apocalyptic number.

67528971 is a deficient number, since it is larger than the sum of its proper divisors (33625901).

67528971 is an equidigital number, since it uses as much as digits as its factorization.

67528971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277912 (or 277900 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 67528971 is about 8217.6012923480. The cubic root of 67528971 is about 407.2208855594.

It can be divided in two parts, 675 and 28971, that added together give a triangular number (29646 = T₂₄₃).

The spelling of 67528971 in words is "sixty-seven million, five hundred twenty-eight thousand, nine hundred seventy-one".