402680449 has 2 divisors, whose sum is σ = 402680450. Its totient is φ = 402680448.

The previous prime is 402680437. The next prime is 402680461. The reversal of 402680449 is 944086204.

It is a balanced prime because it is at equal distance from previous prime (402680437) and next prime (402680461).

It can be written as a sum of positive squares in only one way, i.e., 355511025 + 47169424 = 18855^2 + 6868^2 .

It is a cyclic number.

It is not a de Polignac number, because 402680449 - 2⁷ = 402680321 is a prime.

It is not a weakly prime, because it can be changed into another prime (402680419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201340224 + 201340225.

It is an arithmetic number, because the mean of its divisors is an integer number (201340225).

Almost surely, 2^402680449 is an apocalyptic number.

It is an amenable number.

402680449 is a deficient number, since it is larger than the sum of its proper divisors (1).

402680449 is an equidigital number, since it uses as much as digits as its factorization.

402680449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 402680449 is about 20066.8993369678. The cubic root of 402680449 is about 738.4484468535.

The spelling of 402680449 in words is "four hundred two million, six hundred eighty thousand, four hundred forty-nine".