87683869829 has 4 divisors (see below), whose sum is σ = 89121310380. Its totient is φ = 86246429280.

The previous prime is 87683869807. The next prime is 87683869843. The reversal of 87683869829 is 92896838678.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24470344900 + 63213524929 = 156430^2 + 251423^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87683869829 is a prime.

It is a super-2 number, since 2×87683869829² (a number of 23 digits) contains 22 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 (87683869879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 718720184 + ... + 718720305.

It is an arithmetic number, because the mean of its divisors is an integer number (22280327595).

Almost surely, 2^87683869829 is an apocalyptic number.

It is an amenable number.

87683869829 is a deficient number, since it is larger than the sum of its proper divisors (1437440551).

87683869829 is a wasteful number, since it uses less digits than its factorization.

87683869829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437440550.

The product of its digits is 501645312, while the sum is 74.

The spelling of 87683869829 in words is "eighty-seven billion, six hundred eighty-three million, eight hundred sixty-nine thousand, eight hundred twenty-nine".