68371989 has 16 divisors (see below), whose sum is σ = 104302080. Its totient is φ = 39026160.

The previous prime is 68371931. The next prime is 68371991. The reversal of 68371989 is 98917386.

It is not a de Polignac number, because 68371989 - 2¹⁷ = 68240917 is a prime.

It is a super-2 number, since 2×68371989² = 9349457759632242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68371189) 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, 32994 + ... + 35004.

It is an arithmetic number, because the mean of its divisors is an integer number (6518880).

Almost surely, 2^68371989 is an apocalyptic number.

It is an amenable number.

68371989 is a deficient number, since it is larger than the sum of its proper divisors (35930091).

68371989 is a wasteful number, since it uses less digits than its factorization.

68371989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3640.

The product of its digits is 653184, while the sum is 51.

The square root of 68371989 is about 8268.7356349082. The cubic root of 68371989 is about 408.9084369292.

The spelling of 68371989 in words is "sixty-eight million, three hundred seventy-one thousand, nine hundred eighty-nine".