2197847826087 has 32 divisors (see below), whose sum is σ = 3090470112000. Its totient is φ = 1385519546880.

The previous prime is 2197847826061. The next prime is 2197847826113. The reversal of 2197847826087 is 7806287487912.

It is an interprime number because it is at equal distance from previous prime (2197847826061) and next prime (2197847826113).

It is not a de Polignac number, because 2197847826087 - 2²⁴ = 2197831048871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2197847826037) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75749839 + ... + 75778847.

It is an arithmetic number, because the mean of its divisors is an integer number (96577191000).

Almost surely, 2^{2197847826087} is an apocalyptic number.

2197847826087 is a deficient number, since it is larger than the sum of its proper divisors (892622285913).

2197847826087 is a wasteful number, since it uses less digits than its factorization.

2197847826087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31471.

The product of its (nonzero) digits is 151732224, while the sum is 69.

The spelling of 2197847826087 in words is "two trillion, one hundred ninety-seven billion, eight hundred forty-seven million, eight hundred twenty-six thousand, eighty-seven".