1438134997 has 4 divisors (see below), whose sum is σ = 1548760780. Its totient is φ = 1327509216.

The previous prime is 1438134989. The next prime is 1438135051. The reversal of 1438134997 is 7994318341.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 916515076 + 521619921 = 30274^2 + 22839^2 .

It is a cyclic number.

It is not a de Polignac number, because 1438134997 - 2³ = 1438134989 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 1438134997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438134937) 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, 55312872 + ... + 55312897.

It is an arithmetic number, because the mean of its divisors is an integer number (387190195).

Almost surely, 2^1438134997 is an apocalyptic number.

It is an amenable number.

1438134997 is a deficient number, since it is larger than the sum of its proper divisors (110625783).

1438134997 is a wasteful number, since it uses less digits than its factorization.

1438134997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110625782.

The product of its digits is 653184, while the sum is 49.

The square root of 1438134997 is about 37922.7503881245. The cubic root of 1438134997 is about 1128.7555143141.

The spelling of 1438134997 in words is "one billion, four hundred thirty-eight million, one hundred thirty-four thousand, nine hundred ninety-seven".