402725819 has 2 divisors, whose sum is σ = 402725820. Its totient is φ = 402725818.

The previous prime is 402725809. The next prime is 402725849. The reversal of 402725819 is 918527204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402725819 - 2⁴ = 402725803 is a prime.

It is a super-2 number, since 2×402725819² = 324376170578441522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (402725809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201362909 + 201362910.

It is an arithmetic number, because the mean of its divisors is an integer number (201362910).

Almost surely, 2^402725819 is an apocalyptic number.

402725819 is a deficient number, since it is larger than the sum of its proper divisors (1).

402725819 is an equidigital number, since it uses as much as digits as its factorization.

402725819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 402725819 is about 20068.0297737471. The cubic root of 402725819 is about 738.4761794704.

The spelling of 402725819 in words is "four hundred two million, seven hundred twenty-five thousand, eight hundred nineteen".