145942369 has 2 divisors, whose sum is σ = 145942370. Its totient is φ = 145942368.

The previous prime is 145942351. The next prime is 145942373. The reversal of 145942369 is 963249541.

145942369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136609344 + 9333025 = 11688^2 + 3055^2 .

It is an emirp because it is prime and its reverse (963249541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145942369 - 2²¹ = 143845217 is a prime.

It is a super-2 number, since 2×145942369² = 42598350138664322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145942339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72971184 + 72971185.

It is an arithmetic number, because the mean of its divisors is an integer number (72971185).

Almost surely, 2^145942369 is an apocalyptic number.

It is an amenable number.

145942369 is a deficient number, since it is larger than the sum of its proper divisors (1).

145942369 is an equidigital number, since it uses as much as digits as its factorization.

145942369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 43.

The square root of 145942369 is about 12080.6609504613. The cubic root of 145942369 is about 526.4944496919.

The spelling of 145942369 in words is "one hundred forty-five million, nine hundred forty-two thousand, three hundred sixty-nine".