1451381939 has 16 divisors (see below), whose sum is σ = 1689028608. Its totient is φ = 1221435072.

The previous prime is 1451381819. The next prime is 1451381957. The reversal of 1451381939 is 9391831541.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1451381939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1451381939.

It is not an unprimeable number, because it can be changed into a prime (1451381969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141854 + ... + 151740.

It is an arithmetic number, because the mean of its divisors is an integer number (105564288).

Almost surely, 2^1451381939 is an apocalyptic number.

1451381939 is a deficient number, since it is larger than the sum of its proper divisors (237646669).

1451381939 is an equidigital number, since it uses as much as digits as its factorization.

1451381939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10274.

The product of its digits is 116640, while the sum is 44.

The square root of 1451381939 is about 38097.0069559277. The cubic root of 1451381939 is about 1132.2106563452.

The spelling of 1451381939 in words is "one billion, four hundred fifty-one million, three hundred eighty-one thousand, nine hundred thirty-nine".