387991421074 has 4 divisors (see below), whose sum is σ = 581987131614. Its totient is φ = 193995710536.

The previous prime is 387991421053. The next prime is 387991421117. The reversal of 387991421074 is 470124199783.

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

It can be written as a sum of positive squares in only one way, i.e., 369439074225 + 18552346849 = 607815^2 + 136207^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96997855267 + ... + 96997855270.

Almost surely, 2^387991421074 is an apocalyptic number.

387991421074 is a deficient number, since it is larger than the sum of its proper divisors (193995710540).

387991421074 is a wasteful number, since it uses less digits than its factorization.

387991421074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193995710539.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 387991421074 in words is "three hundred eighty-seven billion, nine hundred ninety-one million, four hundred twenty-one thousand, seventy-four".