145804891 has 2 divisors, whose sum is σ = 145804892. Its totient is φ = 145804890.

The previous prime is 145804829. The next prime is 145804907. The reversal of 145804891 is 198408541.

145804891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145804891 is a prime.

It is not a weakly prime, because it can be changed into another prime (145801891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72902445 + 72902446.

It is an arithmetic number, because the mean of its divisors is an integer number (72902446).

Almost surely, 2^145804891 is an apocalyptic number.

145804891 is a deficient number, since it is larger than the sum of its proper divisors (1).

145804891 is an equidigital number, since it uses as much as digits as its factorization.

145804891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 145804891 is about 12074.9696065870. The cubic root of 145804891 is about 526.3290781503.

The spelling of 145804891 in words is "one hundred forty-five million, eight hundred four thousand, eight hundred ninety-one".