920424397 has 2 divisors, whose sum is σ = 920424398. Its totient is φ = 920424396.

The previous prime is 920424371. The next prime is 920424403. The reversal of 920424397 is 793424029.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 571257801 + 349166596 = 23901^2 + 18686^2 .

It is an emirp because it is prime and its reverse (793424029) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 920424397 - 2²⁷ = 786206669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (920424347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460212198 + 460212199.

It is an arithmetic number, because the mean of its divisors is an integer number (460212199).

Almost surely, 2^920424397 is an apocalyptic number.

It is an amenable number.

920424397 is a deficient number, since it is larger than the sum of its proper divisors (1).

920424397 is an equidigital number, since it uses as much as digits as its factorization.

920424397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 920424397 is about 30338.4969469484. The cubic root of 920424397 is about 972.7383553228.

The spelling of 920424397 in words is "nine hundred twenty million, four hundred twenty-four thousand, three hundred ninety-seven".