145404319 has 4 divisors (see below), whose sum is σ = 147244960. Its totient is φ = 143563680.

The previous prime is 145404307. The next prime is 145404331. The reversal of 145404319 is 913404541.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (145404307) and next prime (145404331).

It is a cyclic number.

It is not a de Polignac number, because 145404319 - 2⁹ = 145403807 is a prime.

It is a super-2 number, since 2×145404319² = 42284831967707522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145404019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920202 + ... + 920359.

It is an arithmetic number, because the mean of its divisors is an integer number (36811240).

Almost surely, 2^145404319 is an apocalyptic number.

145404319 is a deficient number, since it is larger than the sum of its proper divisors (1840641).

145404319 is an equidigital number, since it uses as much as digits as its factorization.

145404319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840640.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 145404319 is about 12058.3713245197. The cubic root of 145404319 is about 525.8466387755.

The spelling of 145404319 in words is "one hundred forty-five million, four hundred four thousand, three hundred nineteen".