387216061 has 4 divisors (see below), whose sum is σ = 387260352. Its totient is φ = 387171772.

The previous prime is 387216059. The next prime is 387216073. The reversal of 387216061 is 160612783.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 160612783 = 43 ⋅3735181.

It is a cyclic number.

It is not a de Polignac number, because 387216061 - 2¹ = 387216059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387216001) 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, 4165 + ... + 28138.

It is an arithmetic number, because the mean of its divisors is an integer number (96815088).

Almost surely, 2^387216061 is an apocalyptic number.

It is an amenable number.

387216061 is a deficient number, since it is larger than the sum of its proper divisors (44291).

387216061 is a wasteful number, since it uses less digits than its factorization.

387216061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44290.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 387216061 is about 19677.8063055819. The cubic root of 387216061 is about 728.8717549913.

The spelling of 387216061 in words is "three hundred eighty-seven million, two hundred sixteen thousand, sixty-one".