145398191 has 2 divisors, whose sum is σ = 145398192. Its totient is φ = 145398190.

The previous prime is 145398181. The next prime is 145398251. The reversal of 145398191 is 191893541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145398191 - 2¹⁰ = 145397167 is a prime.

It is a super-2 number, since 2×145398191² = 42281267892144962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145398101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72699095 + 72699096.

It is an arithmetic number, because the mean of its divisors is an integer number (72699096).

Almost surely, 2^145398191 is an apocalyptic number.

145398191 is a deficient number, since it is larger than the sum of its proper divisors (1).

145398191 is an equidigital number, since it uses as much as digits as its factorization.

145398191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 41.

The square root of 145398191 is about 12058.1172245090. The cubic root of 145398191 is about 525.8392514813.

The spelling of 145398191 in words is "one hundred forty-five million, three hundred ninety-eight thousand, one hundred ninety-one".