87023377897 has 4 divisors (see below), whose sum is σ = 87272728900. Its totient is φ = 86774026896.

The previous prime is 87023377849. The next prime is 87023377901. The reversal of 87023377897 is 79877332078.

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

It can be written as a sum of positive squares in 2 ways, for example, as 64098086976 + 22925290921 = 253176^2 + 151411^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87023377897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87023377807) 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, 124674978 + ... + 124675675.

It is an arithmetic number, because the mean of its divisors is an integer number (21818182225).

Almost surely, 2^87023377897 is an apocalyptic number.

It is an amenable number.

87023377897 is a deficient number, since it is larger than the sum of its proper divisors (249351003).

87023377897 is a wasteful number, since it uses less digits than its factorization.

87023377897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249351002.

The product of its (nonzero) digits is 24893568, while the sum is 61.

The spelling of 87023377897 in words is "eighty-seven billion, twenty-three million, three hundred seventy-seven thousand, eight hundred ninety-seven".