428926397 has 2 divisors, whose sum is σ = 428926398. Its totient is φ = 428926396.

The previous prime is 428926373. The next prime is 428926427. The reversal of 428926397 is 793629824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264420121 + 164506276 = 16261^2 + 12826^2 .

It is a cyclic number.

It is not a de Polignac number, because 428926397 - 2¹⁰ = 428925373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428926367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214463198 + 214463199.

It is an arithmetic number, because the mean of its divisors is an integer number (214463199).

Almost surely, 2^428926397 is an apocalyptic number.

It is an amenable number.

428926397 is a deficient number, since it is larger than the sum of its proper divisors (1).

428926397 is an equidigital number, since it uses as much as digits as its factorization.

428926397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The square root of 428926397 is about 20710.5383078277. The cubic root of 428926397 is about 754.1555384389.

The spelling of 428926397 in words is "four hundred twenty-eight million, nine hundred twenty-six thousand, three hundred ninety-seven".