1307943945 has 96 divisors (see below), whose sum is σ = 2975431680. Its totient is φ = 514926720.

The previous prime is 1307943937. The next prime is 1307943947. The reversal of 1307943945 is 5493497031.

It is not a de Polignac number, because 1307943945 - 2³ = 1307943937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1307943945.

It is not an unprimeable number, because it can be changed into a prime (1307943947) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 55902 + ... + 75768.

It is an arithmetic number, because the mean of its divisors is an integer number (30994080).

Almost surely, 2^1307943945 is an apocalyptic number.

1307943945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1307943945 is an abundant number, since it is smaller than the sum of its proper divisors (1667487735).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1307943945 is a wasteful number, since it uses less digits than its factorization.

1307943945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19915 (or 19912 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 1307943945 is about 36165.5076696014. The cubic root of 1307943945 is about 1093.6114381423.

The spelling of 1307943945 in words is "one billion, three hundred seven million, nine hundred forty-three thousand, nine hundred forty-five".