145451819 has 2 divisors, whose sum is σ = 145451820. Its totient is φ = 145451818.

The previous prime is 145451777. The next prime is 145451837. The reversal of 145451819 is 918154541.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145451819 is a prime.

It is a super-2 number, since 2×145451819² = 42312463300817522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145451879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72725909 + 72725910.

It is an arithmetic number, because the mean of its divisors is an integer number (72725910).

Almost surely, 2^145451819 is an apocalyptic number.

145451819 is a deficient number, since it is larger than the sum of its proper divisors (1).

145451819 is an equidigital number, since it uses as much as digits as its factorization.

145451819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 38.

The square root of 145451819 is about 12060.3407497467. The cubic root of 145451819 is about 525.9038929115.

The spelling of 145451819 in words is "one hundred forty-five million, four hundred fifty-one thousand, eight hundred nineteen".