161148999 has 8 divisors (see below), whose sum is σ = 234398592. Its totient is φ = 97666040.

The previous prime is 161148941. The next prime is 161149031. The reversal of 161148999 is 999841161.

It is a happy number.

161148999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161148999 - 2²⁷ = 26931271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161148919) 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, 2441619 + ... + 2441684.

It is an arithmetic number, because the mean of its divisors is an integer number (29299824).

Almost surely, 2^161148999 is an apocalyptic number.

161148999 is a deficient number, since it is larger than the sum of its proper divisors (73249593).

161148999 is a wasteful number, since it uses less digits than its factorization.

161148999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4883317.

The product of its digits is 139968, while the sum is 48.

The square root of 161148999 is about 12694.4475657667. The cubic root of 161148999 is about 544.1799512350.

The spelling of 161148999 in words is "one hundred sixty-one million, one hundred forty-eight thousand, nine hundred ninety-nine".