426215399 has 2 divisors, whose sum is σ = 426215400. Its totient is φ = 426215398.

The previous prime is 426215359. The next prime is 426215401. The reversal of 426215399 is 993512624.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426215399 is a prime.

Together with 426215401, 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 (426215329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213107699 + 213107700.

It is an arithmetic number, because the mean of its divisors is an integer number (213107700).

Almost surely, 2^426215399 is an apocalyptic number.

426215399 is a deficient number, since it is larger than the sum of its proper divisors (1).

426215399 is an equidigital number, since it uses as much as digits as its factorization.

426215399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 41.

The square root of 426215399 is about 20644.9848389385. The cubic root of 426215399 is about 752.5633175199.

The spelling of 426215399 in words is "four hundred twenty-six million, two hundred fifteen thousand, three hundred ninety-nine".