87723819 has 12 divisors (see below), whose sum is σ = 126796696. Its totient is φ = 58443552.

The previous prime is 87723803. The next prime is 87723833. The reversal of 87723819 is 91832778.

It is not a de Polignac number, because 87723819 - 2⁴ = 87723803 is a prime.

It is a super-2 number, since 2×87723819² = 15390936839889522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87723319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19047 + ... + 23199.

Almost surely, 2^87723819 is an apocalyptic number.

87723819 is a deficient number, since it is larger than the sum of its proper divisors (39072877).

87723819 is a wasteful number, since it uses less digits than its factorization.

87723819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6506 (or 6503 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 87723819 is about 9366.0994549492. The cubic root of 87723819 is about 444.3302115007.

It can be divided in two parts, 87 and 723819, that multiplied together give a triangular number (62972253 = T₁₁₂₂₂).

The spelling of 87723819 in words is "eighty-seven million, seven hundred twenty-three thousand, eight hundred nineteen".