1375631949 has 4 divisors (see below), whose sum is σ = 1834175936. Its totient is φ = 917087964.

The previous prime is 1375631927. The next prime is 1375631953. The reversal of 1375631949 is 9491365731.

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.

It is not a de Polignac number, because 1375631949 - 2¹³ = 1375623757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1375631898 and 1375631907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375631969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229271989 + ... + 229271994.

It is an arithmetic number, because the mean of its divisors is an integer number (458543984).

Almost surely, 2^1375631949 is an apocalyptic number.

It is an amenable number.

1375631949 is a deficient number, since it is larger than the sum of its proper divisors (458543987).

1375631949 is an equidigital number, since it uses as much as digits as its factorization.

1375631949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458543986.

The product of its digits is 612360, while the sum is 48.

The square root of 1375631949 is about 37089.5126551968. The cubic root of 1375631949 is about 1112.1603757981.

The spelling of 1375631949 in words is "one billion, three hundred seventy-five million, six hundred thirty-one thousand, nine hundred forty-nine".