387649679 has 2 divisors, whose sum is σ = 387649680. Its totient is φ = 387649678.

The previous prime is 387649673. The next prime is 387649681. The reversal of 387649679 is 976946783.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 387649679 - 2²⁸ = 119214223 is a prime.

It is a Sophie Germain prime.

Together with 387649681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387649673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193824839 + 193824840.

It is an arithmetic number, because the mean of its divisors is an integer number (193824840).

Almost surely, 2^387649679 is an apocalyptic number.

387649679 is a deficient number, since it is larger than the sum of its proper divisors (1).

387649679 is an equidigital number, since it uses as much as digits as its factorization.

387649679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 59.

The square root of 387649679 is about 19688.8211683686. The cubic root of 387649679 is about 729.1437254685.

The spelling of 387649679 in words is "three hundred eighty-seven million, six hundred forty-nine thousand, six hundred seventy-nine".