987693081 has 16 divisors (see below), whose sum is σ = 1399711104. Its totient is φ = 617364224.

The previous prime is 987693053. The next prime is 987693103. The reversal of 987693081 is 180396789.

It is a cyclic number.

It is not a de Polignac number, because 987693081 - 2¹³ = 987684889 is a prime.

It is a super-2 number, since 2×987693081² = 1951075244510545122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (987693041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23406 + ... + 50231.

It is an arithmetic number, because the mean of its divisors is an integer number (87481944).

Almost surely, 2^987693081 is an apocalyptic number.

It is an amenable number.

987693081 is a deficient number, since it is larger than the sum of its proper divisors (412018023).

987693081 is a wasteful number, since it uses less digits than its factorization.

987693081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73920.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 987693081 is about 31427.5847147056. The cubic root of 987693081 is about 995.8807487345.

The spelling of 987693081 in words is "nine hundred eighty-seven million, six hundred ninety-three thousand, eighty-one".