87541919 has 4 divisors (see below), whose sum is σ = 88031160. Its totient is φ = 87052680.

The previous prime is 87541907. The next prime is 87541931. The reversal of 87541919 is 91914578.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (87541907) and next prime (87541931).

It is a cyclic number.

It is not a de Polignac number, because 87541919 - 2⁴ = 87541903 is a prime.

It is a super-2 number, since 2×87541919² = 15327175164405122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87541919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87541939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244352 + ... + 244709.

It is an arithmetic number, because the mean of its divisors is an integer number (22007790).

Almost surely, 2^87541919 is an apocalyptic number.

87541919 is a deficient number, since it is larger than the sum of its proper divisors (489241).

87541919 is a wasteful number, since it uses less digits than its factorization.

87541919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489240.

The product of its digits is 90720, while the sum is 44.

The square root of 87541919 is about 9356.3838634378. The cubic root of 87541919 is about 444.0228848822.

The spelling of 87541919 in words is "eighty-seven million, five hundred forty-one thousand, nine hundred nineteen".