1979964387 has 12 divisors (see below), whose sum is σ = 2937244960. Its totient is φ = 1284301008.

The previous prime is 1979964383. The next prime is 1979964391. The reversal of 1979964387 is 7834699791.

1979964387 is a `hidden beast` number, since 197 + 9 + 9 + 6 + 438 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (1979964383) and next prime (1979964391).

It is not a de Polignac number, because 1979964387 - 2² = 1979964383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979964383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2972587 + ... + 2973252.

Almost surely, 2^1979964387 is an apocalyptic number.

1979964387 is a deficient number, since it is larger than the sum of its proper divisors (957280573).

1979964387 is a wasteful number, since it uses less digits than its factorization.

1979964387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5945882 (or 5945879 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 63.

The square root of 1979964387 is about 44496.7907494462. The cubic root of 1979964387 is about 1255.6997070631.

The spelling of 1979964387 in words is "one billion, nine hundred seventy-nine million, nine hundred sixty-four thousand, three hundred eighty-seven".