87145378 has 4 divisors (see below), whose sum is σ = 130718070. Its totient is φ = 43572688.

The previous prime is 87145363. The next prime is 87145403. The reversal of 87145378 is 87354178.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87354178 = 2 ⋅43677089.

It can be written as a sum of positive squares in only one way, i.e., 84511249 + 2634129 = 9193^2 + 1623^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21786343 + ... + 21786346.

Almost surely, 2^87145378 is an apocalyptic number.

87145378 is a deficient number, since it is larger than the sum of its proper divisors (43572692).

87145378 is a wasteful number, since it uses less digits than its factorization.

87145378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43572691.

The product of its digits is 188160, while the sum is 43.

The square root of 87145378 is about 9335.1688790295. The cubic root of 87145378 is about 443.3514358724.

The spelling of 87145378 in words is "eighty-seven million, one hundred forty-five thousand, three hundred seventy-eight".