87492305779 has 4 divisors (see below), whose sum is σ = 87492968640. Its totient is φ = 87491642920.

The previous prime is 87492305759. The next prime is 87492305821. The reversal of 87492305779 is 97750329478.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 97750329478 = 2 ⋅48875164739.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87492305779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87492305759) 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, 58552 + ... + 422389.

It is an arithmetic number, because the mean of its divisors is an integer number (21873242160).

Almost surely, 2^87492305779 is an apocalyptic number.

87492305779 is a deficient number, since it is larger than the sum of its proper divisors (662861).

87492305779 is a wasteful number, since it uses less digits than its factorization.

87492305779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662860.

The product of its (nonzero) digits is 26671680, while the sum is 61.

The spelling of 87492305779 in words is "eighty-seven billion, four hundred ninety-two million, three hundred five thousand, seven hundred seventy-nine".