87144465 has 16 divisors (see below), whose sum is σ = 147633408. Its totient is φ = 43742976.

The previous prime is 87144461. The next prime is 87144481. The reversal of 87144465 is 56444178.

It is not a de Polignac number, because 87144465 - 2² = 87144461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87144461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170617 + ... + 171126.

It is an arithmetic number, because the mean of its divisors is an integer number (9227088).

Almost surely, 2^87144465 is an apocalyptic number.

87144465 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

87144465 is a deficient number, since it is larger than the sum of its proper divisors (60488943).

87144465 is a wasteful number, since it uses less digits than its factorization.

87144465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341768.

The product of its digits is 107520, while the sum is 39.

The square root of 87144465 is about 9335.1199778042. The cubic root of 87144465 is about 443.3498875735.

The spelling of 87144465 in words is "eighty-seven million, one hundred forty-four thousand, four hundred sixty-five".