87489929293 has 16 divisors (see below), whose sum is σ = 99772461936. Its totient is φ = 76001587200.

The previous prime is 87489929291. The next prime is 87489929341. The reversal of 87489929293 is 39292998478.

It can be written as a sum of positive squares in 8 ways, for example, as 1187353764 + 86302575529 = 34458^2 + 293773^2 .

It is not a de Polignac number, because 87489929293 - 2¹ = 87489929291 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87489929291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3663993 + ... + 3687793.

It is an arithmetic number, because the mean of its divisors is an integer number (6235778871).

Almost surely, 2^87489929293 is an apocalyptic number.

It is an amenable number.

87489929293 is a deficient number, since it is larger than the sum of its proper divisors (12282532643).

87489929293 is a wasteful number, since it uses less digits than its factorization.

87489929293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40464.

The product of its digits is 141087744, while the sum is 70.

The spelling of 87489929293 in words is "eighty-seven billion, four hundred eighty-nine million, nine hundred twenty-nine thousand, two hundred ninety-three".