145962809 has 2 divisors, whose sum is σ = 145962810. Its totient is φ = 145962808.

The previous prime is 145962781. The next prime is 145962821. The reversal of 145962809 is 908269541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105678400 + 40284409 = 10280^2 + 6347^2 .

It is a cyclic number.

It is not a de Polignac number, because 145962809 - 2¹⁶ = 145897273 is a prime.

It is a super-2 number, since 2×145962809² = 42610283222340962, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145962809.

It is not a weakly prime, because it can be changed into another prime (145962889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72981404 + 72981405.

It is an arithmetic number, because the mean of its divisors is an integer number (72981405).

Almost surely, 2^145962809 is an apocalyptic number.

It is an amenable number.

145962809 is a deficient number, since it is larger than the sum of its proper divisors (1).

145962809 is an equidigital number, since it uses as much as digits as its factorization.

145962809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 145962809 is about 12081.5069010451. The cubic root of 145962809 is about 526.5190279878.

The spelling of 145962809 in words is "one hundred forty-five million, nine hundred sixty-two thousand, eight hundred nine".