861152099 has 8 divisors (see below), whose sum is σ = 881704560. Its totient is φ = 840623616.

The previous prime is 861152087. The next prime is 861152107. The reversal of 861152099 is 990251168.

It is a happy number.

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 861152099 - 2²⁰ = 860103523 is a prime.

It is a super-2 number, since 2×861152099² = 1483165875224211602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861182099) 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, 81767 + ... + 91695.

It is an arithmetic number, because the mean of its divisors is an integer number (110213070).

Almost surely, 2^861152099 is an apocalyptic number.

861152099 is a deficient number, since it is larger than the sum of its proper divisors (20552461).

861152099 is a wasteful number, since it uses less digits than its factorization.

861152099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11989.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 861152099 is about 29345.3931478179. The cubic root of 861152099 is about 951.3930068192.

The spelling of 861152099 in words is "eight hundred sixty-one million, one hundred fifty-two thousand, ninety-nine".