87779019 has 8 divisors (see below), whose sum is σ = 117248832. Its totient is φ = 58414280.

The previous prime is 87778997. The next prime is 87779023. The reversal of 87779019 is 91097778.

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

It is a cyclic number.

It is not a de Polignac number, because 87779019 - 2⁵ = 87778987 is a prime.

It is a super-2 number, since 2×87779019² = 15410312353204722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87779089) 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, 24297 + ... + 27674.

It is an arithmetic number, because the mean of its divisors is an integer number (14656104).

Almost surely, 2^87779019 is an apocalyptic number.

87779019 is a deficient number, since it is larger than the sum of its proper divisors (29469813).

87779019 is a wasteful number, since it uses less digits than its factorization.

87779019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52537.

The product of its (nonzero) digits is 222264, while the sum is 48.

The square root of 87779019 is about 9369.0457891933. The cubic root of 87779019 is about 444.4233898614.

The spelling of 87779019 in words is "eighty-seven million, seven hundred seventy-nine thousand, nineteen".