1336945981 has 16 divisors (see below), whose sum is σ = 1565714304. Its totient is φ = 1117698624.

The previous prime is 1336945927. The next prime is 1336945991. The reversal of 1336945981 is 1895496331.

It is not a de Polignac number, because 1336945981 - 2⁷ = 1336945853 is a prime.

It is a super-2 number, since 2×1336945981² = 3574849112224104722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1336945921) 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 15 ways as a sum of consecutive naturals, for example, 237111 + ... + 242683.

It is an arithmetic number, because the mean of its divisors is an integer number (97857144).

Almost surely, 2^1336945981 is an apocalyptic number.

It is an amenable number.

1336945981 is a deficient number, since it is larger than the sum of its proper divisors (228768323).

1336945981 is an equidigital number, since it uses as much as digits as its factorization.

1336945981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6420.

The product of its digits is 699840, while the sum is 49.

The square root of 1336945981 is about 36564.2719194571. The cubic root of 1336945981 is about 1101.6355781659.

The spelling of 1336945981 in words is "one billion, three hundred thirty-six million, nine hundred forty-five thousand, nine hundred eighty-one".