1314657981 has 24 divisors (see below), whose sum is σ = 2337171200. Its totient is φ = 693445536.

The previous prime is 1314657973. The next prime is 1314658003. The reversal of 1314657981 is 1897564131.

1314657981 is a `hidden beast` number, since 1 + 31 + 46 + 579 + 8 + 1 = 666.

It is not a de Polignac number, because 1314657981 - 2³ = 1314657973 is a prime.

It is a super-2 number, since 2×1314657981² = 3456651214013992722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1314652981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 801781 + ... + 803418.

Almost surely, 2^1314657981 is an apocalyptic number.

It is an amenable number.

1314657981 is a deficient number, since it is larger than the sum of its proper divisors (1022513219).

1314657981 is a wasteful number, since it uses less digits than its factorization.

1314657981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605225 (or 1605222 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 1314657981 is about 36258.2126007336. The cubic root of 1314657981 is about 1095.4795147600.

The spelling of 1314657981 in words is "one billion, three hundred fourteen million, six hundred fifty-seven thousand, nine hundred eighty-one".