87474037987 has 4 divisors (see below), whose sum is σ = 99970329136. Its totient is φ = 74977746840.

The previous prime is 87474037957. The next prime is 87474038011. The reversal of 87474037987 is 78973047478.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 87474037987 - 2¹¹ = 87474035939 is a prime.

It is a super-2 number, since 2×87474037987² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87474037907) 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, 6248145564 + ... + 6248145577.

It is an arithmetic number, because the mean of its divisors is an integer number (24992582284).

Almost surely, 2^87474037987 is an apocalyptic number.

87474037987 is a deficient number, since it is larger than the sum of its proper divisors (12496291149).

87474037987 is a wasteful number, since it uses less digits than its factorization.

87474037987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12496291148.

The product of its (nonzero) digits is 66382848, while the sum is 64.

The spelling of 87474037987 in words is "eighty-seven billion, four hundred seventy-four million, thirty-seven thousand, nine hundred eighty-seven".