87226472197 has 4 divisors (see below), whose sum is σ = 88704887040. Its totient is φ = 85748057356.

The previous prime is 87226472149. The next prime is 87226472237. The reversal of 87226472197 is 79127462278.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87226472197 - 2¹⁹ = 87225947909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87226472147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739207333 + ... + 739207450.

It is an arithmetic number, because the mean of its divisors is an integer number (22176221760).

Almost surely, 2^87226472197 is an apocalyptic number.

It is an amenable number.

87226472197 is a deficient number, since it is larger than the sum of its proper divisors (1478414843).

87226472197 is a wasteful number, since it uses less digits than its factorization.

87226472197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478414842.

The product of its digits is 4741632, while the sum is 55.

The spelling of 87226472197 in words is "eighty-seven billion, two hundred twenty-six million, four hundred seventy-two thousand, one hundred ninety-seven".