87319012 has 48 divisors (see below), whose sum is σ = 172872000. Its totient is φ = 38246400.

The previous prime is 87319007. The next prime is 87319019. The reversal of 87319012 is 21091378.

It is a super-2 number, since 2×87319012² = 15249219713312288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87319019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174739 + ... + 175237.

It is an arithmetic number, because the mean of its divisors is an integer number (3601500).

Almost surely, 2^87319012 is an apocalyptic number.

87319012 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

87319012 is a deficient number, since it is larger than the sum of its proper divisors (85552988).

87319012 is a wasteful number, since it uses less digits than its factorization.

87319012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 87319012 is about 9344.4642436043. The cubic root of 87319012 is about 443.6456944026.

It can be divided in two parts, 873 and 19012, that multiplied together give a square (16597476 = 4074²).

The spelling of 87319012 in words is "eighty-seven million, three hundred nineteen thousand, twelve".