145501793 has 4 divisors (see below), whose sum is σ = 154060740. Its totient is φ = 136942848.

The previous prime is 145501777. The next prime is 145501799. The reversal of 145501793 is 397105541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62837329 + 82664464 = 7927^2 + 9092^2 .

It is a cyclic number.

It is not a de Polignac number, because 145501793 - 2⁴ = 145501777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145501799) 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, 4279448 + ... + 4279481.

It is an arithmetic number, because the mean of its divisors is an integer number (38515185).

Almost surely, 2^145501793 is an apocalyptic number.

It is an amenable number.

145501793 is a deficient number, since it is larger than the sum of its proper divisors (8558947).

145501793 is an equidigital number, since it uses as much as digits as its factorization.

145501793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8558946.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 145501793 is about 12062.4124038270. The cubic root of 145501793 is about 525.9641156299.

The spelling of 145501793 in words is "one hundred forty-five million, five hundred one thousand, seven hundred ninety-three".