145917911 has 4 divisors (see below), whose sum is σ = 152262192. Its totient is φ = 139573632.

The previous prime is 145917839. The next prime is 145917931. The reversal of 145917911 is 119719541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 119719541 = 1627 ⋅73583.

It is a cyclic number.

It is not a de Polignac number, because 145917911 - 2²² = 141723607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145917931) 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, 3172106 + ... + 3172151.

It is an arithmetic number, because the mean of its divisors is an integer number (38065548).

Almost surely, 2^145917911 is an apocalyptic number.

145917911 is a deficient number, since it is larger than the sum of its proper divisors (6344281).

145917911 is an equidigital number, since it uses as much as digits as its factorization.

145917911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6344280.

The product of its digits is 11340, while the sum is 38.

The square root of 145917911 is about 12079.6486289958. The cubic root of 145917911 is about 526.4650368930.

The spelling of 145917911 in words is "one hundred forty-five million, nine hundred seventeen thousand, nine hundred eleven".