145399017 has 4 divisors (see below), whose sum is σ = 193865360. Its totient is φ = 96932676.

The previous prime is 145399003. The next prime is 145399019. The reversal of 145399017 is 710993541.

It is a happy number.

145399017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 710993541 = 3 ⋅236997847.

It is not a de Polignac number, because 145399017 - 2⁷ = 145398889 is a prime.

It is a super-2 number, since 2×145399017² = 42281748289132578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145399019) 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, 24233167 + ... + 24233172.

It is an arithmetic number, because the mean of its divisors is an integer number (48466340).

Almost surely, 2^145399017 is an apocalyptic number.

It is an amenable number.

145399017 is a deficient number, since it is larger than the sum of its proper divisors (48466343).

145399017 is an equidigital number, since it uses as much as digits as its factorization.

145399017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48466342.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 145399017 is about 12058.1514752469. The cubic root of 145399017 is about 525.8402472351.

The spelling of 145399017 in words is "one hundred forty-five million, three hundred ninety-nine thousand, seventeen".