1438769697 has 4 divisors (see below), whose sum is σ = 1918359600. Its totient is φ = 959179796.

The previous prime is 1438769671. The next prime is 1438769707. The reversal of 1438769697 is 7969678341.

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 a cyclic number.

It is not a de Polignac number, because 1438769697 - 2⁷ = 1438769569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1438769697.

It is not an unprimeable number, because it can be changed into a prime (1438769617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239794947 + ... + 239794952.

It is an arithmetic number, because the mean of its divisors is an integer number (479589900).

Almost surely, 2^1438769697 is an apocalyptic number.

It is an amenable number.

1438769697 is a deficient number, since it is larger than the sum of its proper divisors (479589903).

1438769697 is an equidigital number, since it uses as much as digits as its factorization.

1438769697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479589902.

The product of its digits is 13716864, while the sum is 60.

The square root of 1438769697 is about 37931.1177926515. The cubic root of 1438769697 is about 1128.9215431775.

The spelling of 1438769697 in words is "one billion, four hundred thirty-eight million, seven hundred sixty-nine thousand, six hundred ninety-seven".