145969819 has 2 divisors, whose sum is σ = 145969820. Its totient is φ = 145969818.

The previous prime is 145969783. The next prime is 145969841. The reversal of 145969819 is 918969541.

It is a happy number.

145969819 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 is a cyclic number.

It is not a de Polignac number, because 145969819 - 2¹¹ = 145967771 is a prime.

It is a super-2 number, since 2×145969819² = 42614376117785522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145969319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72984909 + 72984910.

It is an arithmetic number, because the mean of its divisors is an integer number (72984910).

Almost surely, 2^145969819 is an apocalyptic number.

145969819 is a deficient number, since it is larger than the sum of its proper divisors (1).

145969819 is an equidigital number, since it uses as much as digits as its factorization.

145969819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 52.

The square root of 145969819 is about 12081.7970103789. The cubic root of 145969819 is about 526.5274567086.

The spelling of 145969819 in words is "one hundred forty-five million, nine hundred sixty-nine thousand, eight hundred nineteen".