733138421 has 2 divisors, whose sum is σ = 733138422. Its totient is φ = 733138420.

The previous prime is 733138339. The next prime is 733138423. The reversal of 733138421 is 124831337.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 650964196 + 82174225 = 25514^2 + 9065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-733138421 is a prime.

Together with 733138423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (733138423) 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 as a sum of consecutive naturals, namely, 366569210 + 366569211.

It is an arithmetic number, because the mean of its divisors is an integer number (366569211).

Almost surely, 2^733138421 is an apocalyptic number.

It is an amenable number.

733138421 is a deficient number, since it is larger than the sum of its proper divisors (1).

733138421 is an equidigital number, since it uses as much as digits as its factorization.

733138421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 733138421 is about 27076.5289688320. The cubic root of 733138421 is about 901.6998413763.

Adding to 733138421 its reverse (124831337), we get a palindrome (857969758).

The spelling of 733138421 in words is "seven hundred thirty-three million, one hundred thirty-eight thousand, four hundred twenty-one".