72174887 has 4 divisors (see below), whose sum is σ = 72919056. Its totient is φ = 71430720.

The previous prime is 72174853. The next prime is 72174917. The reversal of 72174887 is 78847127.

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 72174887 - 2¹⁴ = 72158503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72174847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371939 + ... + 372132.

It is an arithmetic number, because the mean of its divisors is an integer number (18229764).

Almost surely, 2^72174887 is an apocalyptic number.

72174887 is a deficient number, since it is larger than the sum of its proper divisors (744169).

72174887 is an equidigital number, since it uses as much as digits as its factorization.

72174887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744168.

The product of its digits is 175616, while the sum is 44.

The square root of 72174887 is about 8495.5804392637. The cubic root of 72174887 is about 416.3533252380.

The spelling of 72174887 in words is "seventy-two million, one hundred seventy-four thousand, eight hundred eighty-seven".