9402813809 has 2 divisors, whose sum is σ = 9402813810. Its totient is φ = 9402813808.

The previous prime is 9402813799. The next prime is 9402813853. The reversal of 9402813809 is 9083182049.

It is a happy number.

It is an a-pointer prime, because the next prime (9402813853) can be obtained adding 9402813809 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6319455025 + 3083358784 = 79495^2 + 55528^2 .

It is a cyclic number.

It is not a de Polignac number, because 9402813809 - 2²⁴ = 9386036593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9402813809.

It is not a weakly prime, because it can be changed into another prime (9402813209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4701406904 + 4701406905.

It is an arithmetic number, because the mean of its divisors is an integer number (4701406905).

Almost surely, 2^9402813809 is an apocalyptic number.

It is an amenable number.

9402813809 is a deficient number, since it is larger than the sum of its proper divisors (1).

9402813809 is an equidigital number, since it uses as much as digits as its factorization.

9402813809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 9402813809 is about 96968.1071744726. The cubic root of 9402813809 is about 2110.6648555841.

The spelling of 9402813809 in words is "nine billion, four hundred two million, eight hundred thirteen thousand, eight hundred nine".