1438609031 has 2 divisors, whose sum is σ = 1438609032. Its totient is φ = 1438609030.

The previous prime is 1438609027. The next prime is 1438609063. The reversal of 1438609031 is 1309068341.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1438609031 - 2² = 1438609027 is a prime.

It is a super-2 number, since 2×1438609031² = 4139191888149517922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1438608982 and 1438609000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1438609001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719304515 + 719304516.

It is an arithmetic number, because the mean of its divisors is an integer number (719304516).

Almost surely, 2^1438609031 is an apocalyptic number.

1438609031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438609031 is an equidigital number, since it uses as much as digits as its factorization.

1438609031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1438609031 is about 37928.9998681747. Note that the first 3 decimals coincide. The cubic root of 1438609031 is about 1128.8795197596.

The spelling of 1438609031 in words is "one billion, four hundred thirty-eight million, six hundred nine thousand, thirty-one".