738264421 has 2 divisors, whose sum is σ = 738264422. Its totient is φ = 738264420.

The previous prime is 738264347. The next prime is 738264427. The reversal of 738264421 is 124462837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 724201921 + 14062500 = 26911^2 + 3750^2 .

It is an emirp because it is prime and its reverse (124462837) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 738264421 - 2⁹ = 738263909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (738264427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 369132210 + 369132211.

It is an arithmetic number, because the mean of its divisors is an integer number (369132211).

Almost surely, 2^738264421 is an apocalyptic number.

It is an amenable number.

738264421 is a deficient number, since it is larger than the sum of its proper divisors (1).

738264421 is an equidigital number, since it uses as much as digits as its factorization.

738264421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 37.

The square root of 738264421 is about 27171.0217143191. The cubic root of 738264421 is about 903.7964816638.

The spelling of 738264421 in words is "seven hundred thirty-eight million, two hundred sixty-four thousand, four hundred twenty-one".