402499247 has 2 divisors, whose sum is σ = 402499248. Its totient is φ = 402499246.

The previous prime is 402499243. The next prime is 402499267. The reversal of 402499247 is 742994204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402499247 - 2² = 402499243 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402499243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201249623 + 201249624.

It is an arithmetic number, because the mean of its divisors is an integer number (201249624).

Almost surely, 2^402499247 is an apocalyptic number.

402499247 is a deficient number, since it is larger than the sum of its proper divisors (1).

402499247 is an equidigital number, since it uses as much as digits as its factorization.

402499247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 402499247 is about 20062.3838812839. The cubic root of 402499247 is about 738.3376655366.

The spelling of 402499247 in words is "four hundred two million, four hundred ninety-nine thousand, two hundred forty-seven".