398782151 has 2 divisors, whose sum is σ = 398782152. Its totient is φ = 398782150.

The previous prime is 398782147. The next prime is 398782157. The reversal of 398782151 is 151287893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398782151 - 2² = 398782147 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398782157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199391075 + 199391076.

It is an arithmetic number, because the mean of its divisors is an integer number (199391076).

Almost surely, 2^398782151 is an apocalyptic number.

398782151 is a deficient number, since it is larger than the sum of its proper divisors (1).

398782151 is an equidigital number, since it uses as much as digits as its factorization.

398782151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 44.

The square root of 398782151 is about 19969.5305653388. The cubic root of 398782151 is about 736.0577738743.

The spelling of 398782151 in words is "three hundred ninety-eight million, seven hundred eighty-two thousand, one hundred fifty-one".