87197276477 has 4 divisors (see below), whose sum is σ = 89225120160. Its totient is φ = 85169432796.

The previous prime is 87197276461. The next prime is 87197276497. The reversal of 87197276477 is 77467279178.

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 87197276477 - 2⁴ = 87197276461 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 (87197276437) 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, 1013921777 + ... + 1013921862.

It is an arithmetic number, because the mean of its divisors is an integer number (22306280040).

Almost surely, 2^87197276477 is an apocalyptic number.

It is an amenable number.

87197276477 is a deficient number, since it is larger than the sum of its proper divisors (2027843683).

87197276477 is a wasteful number, since it uses less digits than its factorization.

87197276477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027843682.

The product of its digits is 58084992, while the sum is 65.

The spelling of 87197276477 in words is "eighty-seven billion, one hundred ninety-seven million, two hundred seventy-six thousand, four hundred seventy-seven".