387652765 has 4 divisors (see below), whose sum is σ = 465183324. Its totient is φ = 310122208.

The previous prime is 387652753. The next prime is 387652777. The reversal of 387652765 is 567256783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 567256783 = 523 ⋅1084621.

It is an interprime number because it is at equal distance from previous prime (387652753) and next prime (387652777).

It can be written as a sum of positive squares in 2 ways, for example, as 265461849 + 122190916 = 16293^2 + 11054^2 .

It is a cyclic number.

It is not a de Polignac number, because 387652765 - 2⁷ = 387652637 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38765272 + ... + 38765281.

It is an arithmetic number, because the mean of its divisors is an integer number (116295831).

Almost surely, 2^387652765 is an apocalyptic number.

It is an amenable number.

387652765 is a deficient number, since it is larger than the sum of its proper divisors (77530559).

387652765 is an equidigital number, since it uses as much as digits as its factorization.

387652765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77530558.

The product of its digits is 2116800, while the sum is 49.

The square root of 387652765 is about 19688.8995375567. The cubic root of 387652765 is about 729.1456603182.

The spelling of 387652765 in words is "three hundred eighty-seven million, six hundred fifty-two thousand, seven hundred sixty-five".