402319849 has 2 divisors, whose sum is σ = 402319850. Its totient is φ = 402319848.

The previous prime is 402319843. The next prime is 402319919. The reversal of 402319849 is 948913204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 389667600 + 12652249 = 19740^2 + 3557^2 .

It is a cyclic number.

It is not a de Polignac number, because 402319849 - 2⁷ = 402319721 is a prime.

It is a super-2 number, since 2×402319849² = 323722521798765602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (402319843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201159924 + 201159925.

It is an arithmetic number, because the mean of its divisors is an integer number (201159925).

Almost surely, 2^402319849 is an apocalyptic number.

It is an amenable number.

402319849 is a deficient number, since it is larger than the sum of its proper divisors (1).

402319849 is an equidigital number, since it uses as much as digits as its factorization.

402319849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 402319849 is about 20057.9123789092. The cubic root of 402319849 is about 738.2279543712.

The spelling of 402319849 in words is "four hundred two million, three hundred nineteen thousand, eight hundred forty-nine".