402150109 has 2 divisors, whose sum is σ = 402150110. Its totient is φ = 402150108.

The previous prime is 402150107. The next prime is 402150121. The reversal of 402150109 is 901051204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 370678009 + 31472100 = 19253^2 + 5610^2 .

It is a cyclic number.

It is not a de Polignac number, because 402150109 - 2¹ = 402150107 is a prime.

Together with 402150107, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 402150109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402150103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201075054 + 201075055.

It is an arithmetic number, because the mean of its divisors is an integer number (201075055).

Almost surely, 2^402150109 is an apocalyptic number.

It is an amenable number.

402150109 is a deficient number, since it is larger than the sum of its proper divisors (1).

402150109 is an equidigital number, since it uses as much as digits as its factorization.

402150109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 402150109 is about 20053.6806846025. The cubic root of 402150109 is about 738.1241195411.

The spelling of 402150109 in words is "four hundred two million, one hundred fifty thousand, one hundred nine".