145856973 has 8 divisors (see below), whose sum is σ = 194823648. Its totient is φ = 97064144.

The previous prime is 145856969. The next prime is 145856981. The reversal of 145856973 is 379658541.

145856973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 145856973 - 2² = 145856969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145856983) 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, 41490 + ... + 44867.

It is an arithmetic number, because the mean of its divisors is an integer number (24352956).

Almost surely, 2^145856973 is an apocalyptic number.

It is an amenable number.

145856973 is a deficient number, since it is larger than the sum of its proper divisors (48966675).

145856973 is an equidigital number, since it uses as much as digits as its factorization.

145856973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86923.

The product of its digits is 907200, while the sum is 48.

The square root of 145856973 is about 12077.1260240175. The cubic root of 145856973 is about 526.3917395319.

The spelling of 145856973 in words is "one hundred forty-five million, eight hundred fifty-six thousand, nine hundred seventy-three".