145416989 has 2 divisors, whose sum is σ = 145416990. Its totient is φ = 145416988.

The previous prime is 145416911. The next prime is 145417007. The reversal of 145416989 is 989614541.

145416989 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 can be written as a sum of positive squares in only one way, i.e., 142611364 + 2805625 = 11942^2 + 1675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145416989 is a prime.

It is a super-2 number, since 2×145416989² = 42292201379652242, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145416889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72708494 + 72708495.

It is an arithmetic number, because the mean of its divisors is an integer number (72708495).

Almost surely, 2^145416989 is an apocalyptic number.

It is an amenable number.

145416989 is a deficient number, since it is larger than the sum of its proper divisors (1).

145416989 is an equidigital number, since it uses as much as digits as its factorization.

145416989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 47.

The square root of 145416989 is about 12058.8966742401. The cubic root of 145416989 is about 525.8619117822.

The spelling of 145416989 in words is "one hundred forty-five million, four hundred sixteen thousand, nine hundred eighty-nine".