738226421 has 2 divisors, whose sum is σ = 738226422. Its totient is φ = 738226420.

The previous prime is 738226393. The next prime is 738226427. The reversal of 738226421 is 124622837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 623500900 + 114725521 = 24970^2 + 10711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-738226421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (738226427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 369113210 + 369113211.

It is an arithmetic number, because the mean of its divisors is an integer number (369113211).

Almost surely, 2^738226421 is an apocalyptic number.

It is an amenable number.

738226421 is a deficient number, since it is larger than the sum of its proper divisors (1).

738226421 is an equidigital number, since it uses as much as digits as its factorization.

738226421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 35.

The square root of 738226421 is about 27170.3224309172. The cubic root of 738226421 is about 903.7809746383.

The spelling of 738226421 in words is "seven hundred thirty-eight million, two hundred twenty-six thousand, four hundred twenty-one".