145999999 has 2 divisors, whose sum is σ = 146000000. Its totient is φ = 145999998.

The previous prime is 145999991. The next prime is 146000017. The reversal of 145999999 is 999999541.

It is a weak prime.

It is an emirp because it is prime and its reverse (999999541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145999999 - 2³ = 145999991 is a prime.

145999999 is a modest number, since divided by 99999 gives 1459 as remainder.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 145999999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145999991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72999999 + 73000000.

It is an arithmetic number, because the mean of its divisors is an integer number (73000000).

Almost surely, 2^145999999 is an apocalyptic number.

145999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

145999999 is an equidigital number, since it uses as much as digits as its factorization.

145999999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10628820, while the sum is 64.

The square root of 145999999 is about 12083.0459322143. The cubic root of 145999999 is about 526.5637416149.

It can be divided in two parts, 1459 and 99999, that multiplied together give a palindrome (145898541).

The spelling of 145999999 in words is "one hundred forty-five million, nine hundred ninety-nine thousand, nine hundred ninety-nine".