145501979 has 12 divisors (see below), whose sum is σ = 173836656. Its totient is φ = 119290512.

The previous prime is 145501931. The next prime is 145501987. The reversal of 145501979 is 979105541.

145501979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145501979 - 2¹⁶ = 145436443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145501999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15944 + ... + 23349.

It is an arithmetic number, because the mean of its divisors is an integer number (14486388).

Almost surely, 2^145501979 is an apocalyptic number.

145501979 is a deficient number, since it is larger than the sum of its proper divisors (28334677).

145501979 is an equidigital number, since it uses as much as digits as its factorization.

145501979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39346 (or 39323 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 41.

The square root of 145501979 is about 12062.4201137251. The cubic root of 145501979 is about 525.9643397492.

The spelling of 145501979 in words is "one hundred forty-five million, five hundred one thousand, nine hundred seventy-nine".