149216823 has 66 divisors (see below), whose sum is σ = 269970504. Its totient is φ = 80779032.

The previous prime is 149216807. The next prime is 149216827. The reversal of 149216823 is 328612941.

149216823 is a `hidden beast` number, since 1 + 492 + 168 + 2 + 3 = 666.

It is not a de Polignac number, because 149216823 - 2⁴ = 149216807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149216827) by changing a digit.

It is a polite number, since it can be written in 65 ways as a sum of consecutive naturals, for example, 7853508 + ... + 7853526.

Almost surely, 2^149216823 is an apocalyptic number.

149216823 is a deficient number, since it is larger than the sum of its proper divisors (120753681).

149216823 is an frugal number, since it uses more digits than its factorization.

149216823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 29 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 149216823 is about 12215.4338031852. The cubic root of 149216823 is about 530.4029485821.

The spelling of 149216823 in words is "one hundred forty-nine million, two hundred sixteen thousand, eight hundred twenty-three".