87650945 has 4 divisors (see below), whose sum is σ = 105181140. Its totient is φ = 70120752.

The previous prime is 87650887. The next prime is 87650987. The reversal of 87650945 is 54905678.

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 14531344 + 73119601 = 3812^2 + 8551^2 .

It is a cyclic number.

It is not a de Polignac number, because 87650945 - 2¹⁶ = 87585409 is a prime.

It is a super-3 number, since 3×87650945³ (a number of 25 digits) contains 333 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 87650896 and 87650905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8765090 + ... + 8765099.

It is an arithmetic number, because the mean of its divisors is an integer number (26295285).

Almost surely, 2^87650945 is an apocalyptic number.

It is an amenable number.

87650945 is a deficient number, since it is larger than the sum of its proper divisors (17530195).

87650945 is a wasteful number, since it uses less digits than its factorization.

87650945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17530194.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 87650945 is about 9362.2083399164. The cubic root of 87650945 is about 444.2071393005.

The spelling of 87650945 in words is "eighty-seven million, six hundred fifty thousand, nine hundred forty-five".