83692989 has 24 divisors (see below), whose sum is σ = 130428792. Its totient is φ = 51517440.

The previous prime is 83692981. The next prime is 83692991. The reversal of 83692989 is 98929638.

It can be written as a sum of positive squares in 4 ways, for example, as 33524100 + 50168889 = 5790^2 + 7083^2 .

It is not a de Polignac number, because 83692989 - 2³ = 83692981 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83692981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2949 + ... + 13269.

It is an arithmetic number, because the mean of its divisors is an integer number (5434533).

Almost surely, 2^83692989 is an apocalyptic number.

It is an amenable number.

83692989 is a deficient number, since it is larger than the sum of its proper divisors (46735803).

83692989 is a wasteful number, since it uses less digits than its factorization.

83692989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10397 (or 10394 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 83692989 is about 9148.3872349174. The cubic root of 83692989 is about 437.4177068619.

It can be divided in two parts, 83692 and 989, that added together give a square (84681 = 291²).

The spelling of 83692989 in words is "eighty-three million, six hundred ninety-two thousand, nine hundred eighty-nine".