2991402687 has 64 divisors (see below), whose sum is σ = 5001973760. Its totient is φ = 1548232704.

The previous prime is 2991402683. The next prime is 2991402707. The reversal of 2991402687 is 7862041992.

It is not a de Polignac number, because 2991402687 - 2² = 2991402683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991402683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7313739 + ... + 7314147.

It is an arithmetic number, because the mean of its divisors is an integer number (78155840).

Almost surely, 2^2991402687 is an apocalyptic number.

2991402687 is a deficient number, since it is larger than the sum of its proper divisors (2010571073).

2991402687 is a wasteful number, since it uses less digits than its factorization.

2991402687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 2991402687 is about 54693.7170706106. The cubic root of 2991402687 is about 1440.8705331346.

The spelling of 2991402687 in words is "two billion, nine hundred ninety-one million, four hundred two thousand, six hundred eighty-seven".