402144309947 has 2 divisors, whose sum is σ = 402144309948. Its totient is φ = 402144309946.

The previous prime is 402144309929. The next prime is 402144309989. The reversal of 402144309947 is 749903441204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402144309947 - 2¹⁸ = 402144047803 is a prime.

It is not a weakly prime, because it can be changed into another prime (402144309247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201072154973 + 201072154974.

It is an arithmetic number, because the mean of its divisors is an integer number (201072154974).

Almost surely, 2^402144309947 is an apocalyptic number.

402144309947 is a deficient number, since it is larger than the sum of its proper divisors (1).

402144309947 is an equidigital number, since it uses as much as digits as its factorization.

402144309947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 402144309947 in words is "four hundred two billion, one hundred forty-four million, three hundred nine thousand, nine hundred forty-seven".