68521497 has 8 divisors (see below), whose sum is σ = 99667680. Its totient is φ = 41528160.

The previous prime is 68521487. The next prime is 68521499. The reversal of 68521497 is 79412586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68521497 - 2⁸ = 68521241 is a prime.

It is a super-2 number, since 2×68521497² = 9390391102242018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68521499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1038172 + ... + 1038237.

It is an arithmetic number, because the mean of its divisors is an integer number (12458460).

Almost surely, 2^68521497 is an apocalyptic number.

It is an amenable number.

68521497 is a deficient number, since it is larger than the sum of its proper divisors (31146183).

68521497 is a wasteful number, since it uses less digits than its factorization.

68521497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076423.

The product of its digits is 120960, while the sum is 42.

The square root of 68521497 is about 8277.7712580138. The cubic root of 68521497 is about 409.2062712542.

The spelling of 68521497 in words is "sixty-eight million, five hundred twenty-one thousand, four hundred ninety-seven".