402187147 has 2 divisors, whose sum is σ = 402187148. Its totient is φ = 402187146.

The previous prime is 402187073. The next prime is 402187171. The reversal of 402187147 is 741781204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402187147 is a prime.

It is not a weakly prime, because it can be changed into another prime (402182147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201093573 + 201093574.

It is an arithmetic number, because the mean of its divisors is an integer number (201093574).

Almost surely, 2^402187147 is an apocalyptic number.

402187147 is a deficient number, since it is larger than the sum of its proper divisors (1).

402187147 is an equidigital number, since it uses as much as digits as its factorization.

402187147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 402187147 is about 20054.6041347118. The cubic root of 402187147 is about 738.1467792406.

The spelling of 402187147 in words is "four hundred two million, one hundred eighty-seven thousand, one hundred forty-seven".