431401393 has 2 divisors, whose sum is σ = 431401394. Its totient is φ = 431401392.

The previous prime is 431401351. The next prime is 431401417. The reversal of 431401393 is 393104134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275825664 + 155575729 = 16608^2 + 12473^2 .

It is a cyclic number.

It is not a de Polignac number, because 431401393 - 2⁹ = 431400881 is a prime.

It is a super-2 number, since 2×431401393² = 372214323764680898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (431401193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215700696 + 215700697.

It is an arithmetic number, because the mean of its divisors is an integer number (215700697).

Almost surely, 2^431401393 is an apocalyptic number.

It is an amenable number.

431401393 is a deficient number, since it is larger than the sum of its proper divisors (1).

431401393 is an equidigital number, since it uses as much as digits as its factorization.

431401393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 431401393 is about 20770.2044525325. The cubic root of 431401393 is about 755.6033030002.

The spelling of 431401393 in words is "four hundred thirty-one million, four hundred one thousand, three hundred ninety-three".