145388919 has 16 divisors (see below), whose sum is σ = 215964000. Its totient is φ = 86384256.

The previous prime is 145388899. The next prime is 145388923. The reversal of 145388919 is 919883541.

It is not a de Polignac number, because 145388919 - 2⁹ = 145388407 is a prime.

It is a super-2 number, since 2×145388919² = 42275875535977122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145388959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63144 + ... + 65405.

It is an arithmetic number, because the mean of its divisors is an integer number (13497750).

Almost surely, 2^145388919 is an apocalyptic number.

145388919 is a deficient number, since it is larger than the sum of its proper divisors (70575081).

145388919 is a wasteful number, since it uses less digits than its factorization.

145388919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128594.

The product of its digits is 311040, while the sum is 48.

The square root of 145388919 is about 12057.7327470798. The cubic root of 145388919 is about 525.8280737054.

The spelling of 145388919 in words is "one hundred forty-five million, three hundred eighty-eight thousand, nine hundred nineteen".