6402000149 has 2 divisors, whose sum is σ = 6402000150. Its totient is φ = 6402000148.

The previous prime is 6402000127. The next prime is 6402000151. The reversal of 6402000149 is 9410002046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5579343025 + 822657124 = 74695^2 + 28682^2 .

It is a cyclic number.

It is not a de Polignac number, because 6402000149 - 2¹² = 6401996053 is a prime.

It is a Sophie Germain prime.

Together with 6402000151, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6402000109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3201000074 + 3201000075.

It is an arithmetic number, because the mean of its divisors is an integer number (3201000075).

Almost surely, 2^6402000149 is an apocalyptic number.

It is an amenable number.

6402000149 is a deficient number, since it is larger than the sum of its proper divisors (1).

6402000149 is an equidigital number, since it uses as much as digits as its factorization.

6402000149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 6402000149 is about 80012.4999546946. The cubic root of 6402000149 is about 1856.8289272428.

The spelling of 6402000149 in words is "six billion, four hundred two million, one hundred forty-nine", and thus it is an aban number.