73890987 has 8 divisors (see below), whose sum is σ = 99111936. Its totient is φ = 48965352.

The previous prime is 73890967. The next prime is 73890989. The reversal of 73890987 is 78909837.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73890987 - 2¹¹ = 73888939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73890989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73243 + ... + 74244.

It is an arithmetic number, because the mean of its divisors is an integer number (12388992).

Almost surely, 2^73890987 is an apocalyptic number.

73890987 is a deficient number, since it is larger than the sum of its proper divisors (25220949).

73890987 is a wasteful number, since it uses less digits than its factorization.

73890987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147657.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 73890987 is about 8595.9866798408. The cubic root of 73890987 is about 419.6273849411.

The spelling of 73890987 in words is "seventy-three million, eight hundred ninety thousand, nine hundred eighty-seven".