87378019 has 8 divisors (see below), whose sum is σ = 88510320. Its totient is φ = 86251776.

The previous prime is 87378013. The next prime is 87378037. The reversal of 87378019 is 91087378.

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 87378019 - 2⁵ = 87377987 is a prime.

It is a super-2 number, since 2×87378019² = 15269836408728722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87378013) 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, 32187 + ... + 34795.

It is an arithmetic number, because the mean of its divisors is an integer number (11063790).

Almost surely, 2^87378019 is an apocalyptic number.

87378019 is a deficient number, since it is larger than the sum of its proper divisors (1132301).

87378019 is a wasteful number, since it uses less digits than its factorization.

87378019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 87378019 is about 9347.6210342525. The cubic root of 87378019 is about 443.7456050877.

The spelling of 87378019 in words is "eighty-seven million, three hundred seventy-eight thousand, nineteen".