68362421 has 16 divisors (see below), whose sum is σ = 72690048. Its totient is φ = 64209600.

The previous prime is 68362403. The next prime is 68362493. The reversal of 68362421 is 12426386.

It is a cyclic number.

It is not a de Polignac number, because 68362421 - 2²⁶ = 1253557 is a prime.

It is a super-3 number, since 3×68362421³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68365421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138986 + ... + 139476.

It is an arithmetic number, because the mean of its divisors is an integer number (4543128).

Almost surely, 2^68362421 is an apocalyptic number.

It is an amenable number.

68362421 is a deficient number, since it is larger than the sum of its proper divisors (4327627).

68362421 is a wasteful number, since it uses less digits than its factorization.

68362421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652.

The product of its digits is 13824, while the sum is 32.

The square root of 68362421 is about 8268.1570497905. The cubic root of 68362421 is about 408.8893617762.

The spelling of 68362421 in words is "sixty-eight million, three hundred sixty-two thousand, four hundred twenty-one".