87019121 has 8 divisors (see below), whose sum is σ = 99588864. Its totient is φ = 74484000.

The previous prime is 87019103. The next prime is 87019133. The reversal of 87019121 is 12191078.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87019121 is a prime.

It is a super-2 number, since 2×87019121² = 15144654839225282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87019171) 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, 3020 + ... + 13533.

It is an arithmetic number, because the mean of its divisors is an integer number (12448608).

Almost surely, 2^87019121 is an apocalyptic number.

It is an amenable number.

87019121 is a deficient number, since it is larger than the sum of its proper divisors (12569743).

87019121 is a wasteful number, since it uses less digits than its factorization.

87019121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17311.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 87019121 is about 9328.4039899653. The cubic root of 87019121 is about 443.1372218840.

It can be divided in two parts, 870 and 19121, that added together give a palindrome (19991).

The spelling of 87019121 in words is "eighty-seven million, nineteen thousand, one hundred twenty-one".