68121487 has 8 divisors (see below), whose sum is σ = 78262272. Its totient is φ = 58083000.

The previous prime is 68121467. The next prime is 68121497. The reversal of 68121487 is 78412186.

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 68121487 - 2⁷ = 68121359 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 (68121407) 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, 24139 + ... + 26812.

It is an arithmetic number, because the mean of its divisors is an integer number (9782784).

Almost surely, 2^68121487 is an apocalyptic number.

68121487 is a deficient number, since it is larger than the sum of its proper divisors (10140785).

68121487 is a wasteful number, since it uses less digits than its factorization.

68121487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51149.

The product of its digits is 21504, while the sum is 37.

The square root of 68121487 is about 8253.5741954622. The cubic root of 68121487 is about 408.4084381449.

The spelling of 68121487 in words is "sixty-eight million, one hundred twenty-one thousand, four hundred eighty-seven".