738638531 has 2 divisors, whose sum is σ = 738638532. Its totient is φ = 738638530.

The previous prime is 738638521. The next prime is 738638539. The reversal of 738638531 is 135836837.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 738638531 - 2¹⁰ = 738637507 is a prime.

It is a super-2 number, since 2×738638531² = 1091173758955675922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (738638539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 369319265 + 369319266.

It is an arithmetic number, because the mean of its divisors is an integer number (369319266).

Almost surely, 2^738638531 is an apocalyptic number.

738638531 is a deficient number, since it is larger than the sum of its proper divisors (1).

738638531 is an equidigital number, since it uses as much as digits as its factorization.

738638531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 44.

The square root of 738638531 is about 27177.9051988927. The cubic root of 738638531 is about 903.9491199305.

The spelling of 738638531 in words is "seven hundred thirty-eight million, six hundred thirty-eight thousand, five hundred thirty-one".