87469919 has 4 divisors (see below), whose sum is σ = 88952520. Its totient is φ = 85987320.

The previous prime is 87469903. The next prime is 87469927. The reversal of 87469919 is 91996478.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 87469919 - 2⁴ = 87469903 is a prime.

It is a super-2 number, since 2×87469919² = 15301973459733122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87469999) 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, 741212 + ... + 741329.

It is an arithmetic number, because the mean of its divisors is an integer number (22238130).

Almost surely, 2^87469919 is an apocalyptic number.

87469919 is a deficient number, since it is larger than the sum of its proper divisors (1482601).

87469919 is a wasteful number, since it uses less digits than its factorization.

87469919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482600.

The product of its digits is 979776, while the sum is 53.

The square root of 87469919 is about 9352.5354316356. The cubic root of 87469919 is about 443.9011206778.

It can be divided in two parts, 87469 and 919, that added together give a palindrome (88388).

The spelling of 87469919 in words is "eighty-seven million, four hundred sixty-nine thousand, nine hundred nineteen".