1405931349 has 4 divisors (see below), whose sum is σ = 1874575136. Its totient is φ = 937287564.

The previous prime is 1405931299. The next prime is 1405931363. The reversal of 1405931349 is 9431395041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9431395041 = 3 ⋅3143798347.

It is not a de Polignac number, because 1405931349 - 2⁷ = 1405931221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405933349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234321889 + ... + 234321894.

It is an arithmetic number, because the mean of its divisors is an integer number (468643784).

Almost surely, 2^1405931349 is an apocalyptic number.

It is an amenable number.

1405931349 is a deficient number, since it is larger than the sum of its proper divisors (468643787).

1405931349 is an equidigital number, since it uses as much as digits as its factorization.

1405931349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468643786.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 1405931349 is about 37495.7510792890. The cubic root of 1405931349 is about 1120.2665577814.

The spelling of 1405931349 in words is "one billion, four hundred five million, nine hundred thirty-one thousand, three hundred forty-nine".