68212537 has 8 divisors (see below), whose sum is σ = 70285320. Its totient is φ = 66168960.

The previous prime is 68212531. The next prime is 68212559. The reversal of 68212537 is 73521286.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 249001 + 67963536 = 499^2 + 8244^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 68212537 - 2⁷ = 68212409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68212531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2514 + ... + 11947.

It is an arithmetic number, because the mean of its divisors is an integer number (8785665).

Almost surely, 2^68212537 is an apocalyptic number.

It is an amenable number.

68212537 is a deficient number, since it is larger than the sum of its proper divisors (2072783).

68212537 is a wasteful number, since it uses less digits than its factorization.

68212537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14603.

The product of its digits is 20160, while the sum is 34.

The square root of 68212537 is about 8259.0881457943. The cubic root of 68212537 is about 408.5903143537.

The spelling of 68212537 in words is "sixty-eight million, two hundred twelve thousand, five hundred thirty-seven".