387347661 has 24 divisors (see below), whose sum is σ = 590304000. Its totient is φ = 244078272.

The previous prime is 387347647. The next prime is 387347663. The reversal of 387347661 is 166743783.

It is not a de Polignac number, because 387347661 - 2¹⁰ = 387346637 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387347663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79545 + ... + 84273.

It is an arithmetic number, because the mean of its divisors is an integer number (24596000).

Almost surely, 2^387347661 is an apocalyptic number.

It is an amenable number.

387347661 is a deficient number, since it is larger than the sum of its proper divisors (202956339).

387347661 is a wasteful number, since it uses less digits than its factorization.

387347661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5233 (or 5230 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 387347661 is about 19681.1498901868. The cubic root of 387347661 is about 728.9543175605.

The spelling of 387347661 in words is "three hundred eighty-seven million, three hundred forty-seven thousand, six hundred sixty-one".