87729347431 has 8 divisors (see below), whose sum is σ = 95706892944. Its totient is φ = 79752160320.

The previous prime is 87729347417. The next prime is 87729347437. The reversal of 87729347431 is 13474392778.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87729347431 - 2¹⁵ = 87729314663 is a prime.

It is a super-2 number, since 2×87729347431² (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 (87729347437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 857925 + ... + 954721.

It is an arithmetic number, because the mean of its divisors is an integer number (11963361618).

Almost surely, 2^87729347431 is an apocalyptic number.

87729347431 is a deficient number, since it is larger than the sum of its proper divisors (7977545513).

87729347431 is a wasteful number, since it uses less digits than its factorization.

87729347431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179201.

The product of its digits is 7112448, while the sum is 55.

The spelling of 87729347431 in words is "eighty-seven billion, seven hundred twenty-nine million, three hundred forty-seven thousand, four hundred thirty-one".