87520419 has 30 divisors (see below), whose sum is σ = 152092644. Its totient is φ = 50009400.

The previous prime is 87520417. The next prime is 87520453. The reversal of 87520419 is 91402578.

87520419 = 158² + 159² + ... + 643².

It is not a de Polignac number, because 87520419 - 2¹ = 87520417 is a prime.

It is a super-2 number, since 2×87520419² = 15319647483871122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (87520417) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 7057 + ... + 14994.

Almost surely, 2^87520419 is an apocalyptic number.

87520419 is a deficient number, since it is larger than the sum of its proper divisors (64572225).

87520419 is a wasteful number, since it uses less digits than its factorization.

87520419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22077 (or 22061 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 87520419 is about 9355.2348447273. The cubic root of 87520419 is about 443.9865317317.

The spelling of 87520419 in words is "eighty-seven million, five hundred twenty thousand, four hundred nineteen".