149368821 has 16 divisors (see below), whose sum is σ = 235459200. Its totient is φ = 82410048.

The previous prime is 149368801. The next prime is 149368837. The reversal of 149368821 is 128863941.

It is not a de Polignac number, because 149368821 - 2¹⁷ = 149237749 is a prime.

It is a super-2 number, since 2×149368821² = 44622089373860082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149368801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122026 + ... + 123243.

It is an arithmetic number, because the mean of its divisors is an integer number (14716200).

Almost surely, 2^149368821 is an apocalyptic number.

It is an amenable number.

149368821 is a deficient number, since it is larger than the sum of its proper divisors (86090379).

149368821 is a wasteful number, since it uses less digits than its factorization.

149368821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245308.

The product of its digits is 82944, while the sum is 42.

The square root of 149368821 is about 12221.6537751648. The cubic root of 149368821 is about 530.5829837528.

The spelling of 149368821 in words is "one hundred forty-nine million, three hundred sixty-eight thousand, eight hundred twenty-one".