953818421 has 2 divisors, whose sum is σ = 953818422. Its totient is φ = 953818420.

The previous prime is 953818403. The next prime is 953818451. The reversal of 953818421 is 124818359.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877936900 + 75881521 = 29630^2 + 8711^2 .

It is a cyclic number.

It is not a de Polignac number, because 953818421 - 2¹⁸ = 953556277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (953818451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 476909210 + 476909211.

It is an arithmetic number, because the mean of its divisors is an integer number (476909211).

Almost surely, 2^953818421 is an apocalyptic number.

It is an amenable number.

953818421 is a deficient number, since it is larger than the sum of its proper divisors (1).

953818421 is an equidigital number, since it uses as much as digits as its factorization.

953818421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 41.

The square root of 953818421 is about 30883.9508644862. The cubic root of 953818421 is about 984.3628958297.

The spelling of 953818421 in words is "nine hundred fifty-three million, eight hundred eighteen thousand, four hundred twenty-one".