387351689 has 4 divisors (see below), whose sum is σ = 407738640. Its totient is φ = 366964740.

The previous prime is 387351667. The next prime is 387351703. The reversal of 387351689 is 986153783.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387351689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387351619) 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, 10193447 + ... + 10193484.

It is an arithmetic number, because the mean of its divisors is an integer number (101934660).

Almost surely, 2^387351689 is an apocalyptic number.

It is an amenable number.

387351689 is a deficient number, since it is larger than the sum of its proper divisors (20386951).

387351689 is a wasteful number, since it uses less digits than its factorization.

387351689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20386950.

The product of its digits is 1088640, while the sum is 50.

The square root of 387351689 is about 19681.2522213400. The cubic root of 387351689 is about 728.9568443327.

The spelling of 387351689 in words is "three hundred eighty-seven million, three hundred fifty-one thousand, six hundred eighty-nine".