145393819 has 8 divisors (see below), whose sum is σ = 147768080. Its totient is φ = 143025696.

The previous prime is 145393817. The next prime is 145393837. The reversal of 145393819 is 918393541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145393819 - 2¹ = 145393817 is a prime.

It is a super-2 number, since 2×145393819² = 42278725206809522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145393811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80377 + ... + 82165.

It is an arithmetic number, because the mean of its divisors is an integer number (18471010).

Almost surely, 2^145393819 is an apocalyptic number.

145393819 is a deficient number, since it is larger than the sum of its proper divisors (2374261).

145393819 is a wasteful number, since it uses less digits than its factorization.

145393819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069.

The product of its digits is 116640, while the sum is 43.

The square root of 145393819 is about 12057.9359344790. The cubic root of 145393819 is about 525.8339809154.

The spelling of 145393819 in words is "one hundred forty-five million, three hundred ninety-three thousand, eight hundred nineteen".