67528397 has 4 divisors (see below), whose sum is σ = 67729116. Its totient is φ = 67327680.

The previous prime is 67528387. The next prime is 67528423. The reversal of 67528397 is 79382576.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8099716 + 59428681 = 2846^2 + 7709^2 .

It is a cyclic number.

It is not a de Polignac number, because 67528397 - 2⁶ = 67528333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67528387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99854 + ... + 100527.

It is an arithmetic number, because the mean of its divisors is an integer number (16932279).

Almost surely, 2^67528397 is an apocalyptic number.

It is an amenable number.

67528397 is a deficient number, since it is larger than the sum of its proper divisors (200719).

67528397 is a wasteful number, since it uses less digits than its factorization.

67528397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200718.

The product of its digits is 635040, while the sum is 47.

The square root of 67528397 is about 8217.5663672404. The cubic root of 67528397 is about 407.2197317561.

The spelling of 67528397 in words is "sixty-seven million, five hundred twenty-eight thousand, three hundred ninety-seven".