145431794 has 4 divisors (see below), whose sum is σ = 218147694. Its totient is φ = 72715896.

The previous prime is 145431779. The next prime is 145431799. The reversal of 145431794 is 497134541.

145431794 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.

It can be written as a sum of positive squares in only one way, i.e., 97752769 + 47679025 = 9887^2 + 6905^2 .

It is not an unprimeable number, because it can be changed into a prime (145431799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36357947 + ... + 36357950.

Almost surely, 2^145431794 is an apocalyptic number.

145431794 is a deficient number, since it is larger than the sum of its proper divisors (72715900).

145431794 is an equidigital number, since it uses as much as digits as its factorization.

145431794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72715899.

The product of its digits is 60480, while the sum is 38.

The square root of 145431794 is about 12059.5105207467. The cubic root of 145431794 is about 525.8797572932.

The spelling of 145431794 in words is "one hundred forty-five million, four hundred thirty-one thousand, seven hundred ninety-four".