1187417087977 has 2 divisors, whose sum is σ = 1187417087978. Its totient is φ = 1187417087976.

The previous prime is 1187417087963. The next prime is 1187417088007. The reversal of 1187417087977 is 7797807147811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1075875115536 + 111541972441 = 1037244^2 + 333979^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1187417087977 is a prime.

It is not a weakly prime, because it can be changed into another prime (1187417087917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593708543988 + 593708543989.

It is an arithmetic number, because the mean of its divisors is an integer number (593708543989).

Almost surely, 2^{1187417087977} is an apocalyptic number.

It is an amenable number.

1187417087977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187417087977 is an equidigital number, since it uses as much as digits as its factorization.

1187417087977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38723328, while the sum is 67.

The spelling of 1187417087977 in words is "one trillion, one hundred eighty-seven billion, four hundred seventeen million, eighty-seven thousand, nine hundred seventy-seven".