87247945 has 8 divisors (see below), whose sum is σ = 105001344. Its totient is φ = 69595824.

The previous prime is 87247931. The next prime is 87247949. The reversal of 87247945 is 54974278.

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

It is a cyclic number.

It is not a de Polignac number, because 87247945 - 2⁵ = 87247913 is a prime.

It is a super-2 number, since 2×87247945² = 15224407813446050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87247895 and 87247904.

It is not an unprimeable number, because it can be changed into a prime (87247949) 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, 23409 + ... + 26878.

It is an arithmetic number, because the mean of its divisors is an integer number (13125168).

Almost surely, 2^87247945 is an apocalyptic number.

It is an amenable number.

87247945 is a deficient number, since it is larger than the sum of its proper divisors (17753399).

87247945 is a wasteful number, since it uses less digits than its factorization.

87247945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50639.

The product of its digits is 564480, while the sum is 46.

The square root of 87247945 is about 9340.6608438590. The cubic root of 87247945 is about 443.5253039508.

The spelling of 87247945 in words is "eighty-seven million, two hundred forty-seven thousand, nine hundred forty-five".