913621229 has 2 divisors, whose sum is σ = 913621230. Its totient is φ = 913621228.

The previous prime is 913621183. The next prime is 913621231. The reversal of 913621229 is 922126319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 841116004 + 72505225 = 29002^2 + 8515^2 .

It is an emirp because it is prime and its reverse (922126319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 913621229 - 2¹⁶ = 913555693 is a prime.

Together with 913621231, 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 (913620229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456810614 + 456810615.

It is an arithmetic number, because the mean of its divisors is an integer number (456810615).

Almost surely, 2^913621229 is an apocalyptic number.

It is an amenable number.

913621229 is a deficient number, since it is larger than the sum of its proper divisors (1).

913621229 is an equidigital number, since it uses as much as digits as its factorization.

913621229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 913621229 is about 30226.1679509659. The cubic root of 913621229 is about 970.3358135117.

The spelling of 913621229 in words is "nine hundred thirteen million, six hundred twenty-one thousand, two hundred twenty-nine".