87673073 has 4 divisors (see below), whose sum is σ = 88874148. Its totient is φ = 86472000.

The previous prime is 87673067. The next prime is 87673081. The reversal of 87673073 is 37037678.

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 17247409 + 70425664 = 4153^2 + 8392^2 .

It is a cyclic number.

It is not a de Polignac number, because 87673073 - 2⁶ = 87673009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87673073.

It is not an unprimeable number, because it can be changed into a prime (87673273) 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, 600428 + ... + 600573.

It is an arithmetic number, because the mean of its divisors is an integer number (22218537).

Almost surely, 2^87673073 is an apocalyptic number.

It is an amenable number.

87673073 is a deficient number, since it is larger than the sum of its proper divisors (1201075).

87673073 is a wasteful number, since it uses less digits than its factorization.

87673073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201074.

The product of its (nonzero) digits is 148176, while the sum is 41.

The square root of 87673073 is about 9363.3900378015. The cubic root of 87673073 is about 444.2445170626.

The spelling of 87673073 in words is "eighty-seven million, six hundred seventy-three thousand, seventy-three".