1187617241 has 2 divisors, whose sum is σ = 1187617242. Its totient is φ = 1187617240.

The previous prime is 1187617219. The next prime is 1187617253. The reversal of 1187617241 is 1427167811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1055275225 + 132342016 = 32485^2 + 11504^2 .

It is a cyclic number.

It is not a de Polignac number, because 1187617241 - 2¹⁰ = 1187616217 is a prime.

It is a super-2 number, since 2×1187617241² = 2820869422240904162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1187617195 and 1187617204.

It is not a weakly prime, because it can be changed into another prime (1187617271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593808620 + 593808621.

It is an arithmetic number, because the mean of its divisors is an integer number (593808621).

Almost surely, 2^1187617241 is an apocalyptic number.

It is an amenable number.

1187617241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187617241 is an equidigital number, since it uses as much as digits as its factorization.

1187617241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 38.

The square root of 1187617241 is about 34461.8229494610. The cubic root of 1187617241 is about 1058.9907448953.

The spelling of 1187617241 in words is "one billion, one hundred eighty-seven million, six hundred seventeen thousand, two hundred forty-one".