287179792961 has 4 divisors (see below), whose sum is σ = 289721207172. Its totient is φ = 284638378752.

The previous prime is 287179792937. The next prime is 287179792979. The reversal of 287179792961 is 169297971782.

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 156059761936 + 131120031025 = 395044^2 + 362105^2 .

It is a cyclic number.

It is not a de Polignac number, because 287179792961 - 2³⁸ = 12301886017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 287179792891 and 287179792900.

It is not an unprimeable number, because it can be changed into a prime (287179792661) 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, 1270706936 + ... + 1270707161.

It is an arithmetic number, because the mean of its divisors is an integer number (72430301793).

Almost surely, 2^287179792961 is an apocalyptic number.

It is an amenable number.

287179792961 is a deficient number, since it is larger than the sum of its proper divisors (2541414211).

287179792961 is a wasteful number, since it uses less digits than its factorization.

287179792961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541414210.

The product of its digits is 48009024, while the sum is 68.

The spelling of 287179792961 in words is "two hundred eighty-seven billion, one hundred seventy-nine million, seven hundred ninety-two thousand, nine hundred sixty-one".