68986989 has 12 divisors (see below), whose sum is σ = 101337600. Its totient is φ = 45211464.

The previous prime is 68986963. The next prime is 68986991. The reversal of 68986989 is 98968986.

It is not a de Polignac number, because 68986989 - 2¹⁹ = 68462701 is a prime.

It is a super-2 number, since 2×68986989² = 9518409302572242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68986919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64429 + ... + 65490.

It is an arithmetic number, because the mean of its divisors is an integer number (8444800).

Almost surely, 2^68986989 is an apocalyptic number.

It is an amenable number.

68986989 is a deficient number, since it is larger than the sum of its proper divisors (32350611).

68986989 is a wasteful number, since it uses less digits than its factorization.

68986989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129984 (or 129981 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 63.

The square root of 68986989 is about 8305.8406558277. The cubic root of 68986989 is about 410.1308109273.

It can be divided in two parts, 689 and 86989, that added together give a palindrome (87678).

The spelling of 68986989 in words is "sixty-eight million, nine hundred eighty-six thousand, nine hundred eighty-nine".