387345947 has 2 divisors, whose sum is σ = 387345948. Its totient is φ = 387345946.

The previous prime is 387345911. The next prime is 387345949. The reversal of 387345947 is 749543783.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 387345947 - 2⁶ = 387345883 is a prime.

Together with 387345949, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 387345895 and 387345904.

It is not a weakly prime, because it can be changed into another prime (387345949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193672973 + 193672974.

It is an arithmetic number, because the mean of its divisors is an integer number (193672974).

Almost surely, 2^387345947 is an apocalyptic number.

387345947 is a deficient number, since it is larger than the sum of its proper divisors (1).

387345947 is an equidigital number, since it uses as much as digits as its factorization.

387345947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 50.

The square root of 387345947 is about 19681.1063459349. The cubic root of 387345947 is about 728.9532423597.

The spelling of 387345947 in words is "three hundred eighty-seven million, three hundred forty-five thousand, nine hundred forty-seven".