387288149 has 4 divisors (see below), whose sum is σ = 387725664. Its totient is φ = 386850636.

The previous prime is 387288133. The next prime is 387288199. The reversal of 387288149 is 941882783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 941882783 = 4483 ⋅210101.

It is a cyclic number.

It is not a de Polignac number, because 387288149 - 2⁴ = 387288133 is a prime.

It is a super-2 number, since 2×387288149² = 299984220711692402, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 387288097 and 387288106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387288199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217427 + ... + 219200.

It is an arithmetic number, because the mean of its divisors is an integer number (96931416).

Almost surely, 2^387288149 is an apocalyptic number.

It is an amenable number.

387288149 is a deficient number, since it is larger than the sum of its proper divisors (437515).

387288149 is an equidigital number, since it uses as much as digits as its factorization.

387288149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437514.

The product of its digits is 774144, while the sum is 50.

The square root of 387288149 is about 19679.6379285799. The cubic root of 387288149 is about 728.9169835274.

The spelling of 387288149 in words is "three hundred eighty-seven million, two hundred eighty-eight thousand, one hundred forty-nine".