387895961 has 4 divisors (see below), whose sum is σ = 389220132. Its totient is φ = 386571792.

The previous prime is 387895903. The next prime is 387896017. The reversal of 387895961 is 169598783.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 154753600 + 233142361 = 12440^2 + 15269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387895961 is a prime.

It is a super-2 number, since 2×387895961² = 300926553120227042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 387895897 and 387895906.

It is not an unprimeable number, because it can be changed into a prime (387894961) 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, 661646 + ... + 662231.

It is an arithmetic number, because the mean of its divisors is an integer number (97305033).

Almost surely, 2^387895961 is an apocalyptic number.

It is an amenable number.

387895961 is a deficient number, since it is larger than the sum of its proper divisors (1324171).

387895961 is a wasteful number, since it uses less digits than its factorization.

387895961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324170.

The product of its digits is 3265920, while the sum is 56.

The square root of 387895961 is about 19695.0745365434. The cubic root of 387895961 is about 729.2981062311.

The spelling of 387895961 in words is "three hundred eighty-seven million, eight hundred ninety-five thousand, nine hundred sixty-one".