4087117491 has 4 divisors (see below), whose sum is σ = 5449489992. Its totient is φ = 2724744992.

The previous prime is 4087117481. The next prime is 4087117501. The reversal of 4087117491 is 1947117804.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (4087117481) and next prime (4087117501).

It is a cyclic number.

It is not a de Polignac number, because 4087117491 - 2⁶ = 4087117427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4087117471) 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, 681186246 + ... + 681186251.

It is an arithmetic number, because the mean of its divisors is an integer number (1362372498).

Almost surely, 2^4087117491 is an apocalyptic number.

4087117491 is a deficient number, since it is larger than the sum of its proper divisors (1362372501).

4087117491 is a wasteful number, since it uses less digits than its factorization.

4087117491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362372500.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 4087117491 is about 63930.5677356302. The cubic root of 4087117491 is about 1598.8425862551.

The spelling of 4087117491 in words is "four billion, eighty-seven million, one hundred seventeen thousand, four hundred ninety-one".