76999989 has 32 divisors (see below), whose sum is σ = 118632960. Its totient is φ = 43934400.

The previous prime is 76999981. The next prime is 77000003. The reversal of 76999989 is 98999967.

It is not a de Polignac number, because 76999989 - 2³ = 76999981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76999981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142059 + ... + 142599.

It is an arithmetic number, because the mean of its divisors is an integer number (3707280).

Almost surely, 2^76999989 is an apocalyptic number.

It is an amenable number.

76999989 is a deficient number, since it is larger than the sum of its proper divisors (41632971).

76999989 is a wasteful number, since it uses less digits than its factorization.

76999989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801.

The product of its digits is 19840464, while the sum is 66.

The square root of 76999989 is about 8774.9637606089. The cubic root of 76999989 is about 425.4320662528.

It can be divided in two parts, 7 and 6999989, that added together give a palindrome (6999996).

The spelling of 76999989 in words is "seventy-six million, nine hundred ninety-nine thousand, nine hundred eighty-nine".