145887319 has 4 divisors (see below), whose sum is σ = 154468944. Its totient is φ = 137305696.

The previous prime is 145887283. The next prime is 145887397. The reversal of 145887319 is 913788541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 913788541 = 149 ⋅6132809.

It is a cyclic number.

It is not a de Polignac number, because 145887319 - 2²¹ = 143790167 is a prime.

It is a super-2 number, since 2×145887319² = 42566219690015522, 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 (145887019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4290787 + ... + 4290820.

It is an arithmetic number, because the mean of its divisors is an integer number (38617236).

Almost surely, 2^145887319 is an apocalyptic number.

145887319 is a deficient number, since it is larger than the sum of its proper divisors (8581625).

145887319 is an equidigital number, since it uses as much as digits as its factorization.

145887319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8581624.

The product of its digits is 241920, while the sum is 46.

The square root of 145887319 is about 12078.3823006229. The cubic root of 145887319 is about 526.4282428171.

The spelling of 145887319 in words is "one hundred forty-five million, eight hundred eighty-seven thousand, three hundred nineteen".