145903447 has 2 divisors, whose sum is σ = 145903448. Its totient is φ = 145903446.

The previous prime is 145903427. The next prime is 145903481. The reversal of 145903447 is 744309541.

It is a weak prime.

It is an emirp because it is prime and its reverse (744309541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145903447 - 2⁷ = 145903319 is a prime.

It is a super-3 number, since 3×145903447³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145903427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72951723 + 72951724.

It is an arithmetic number, because the mean of its divisors is an integer number (72951724).

Almost surely, 2^145903447 is an apocalyptic number.

145903447 is a deficient number, since it is larger than the sum of its proper divisors (1).

145903447 is an equidigital number, since it uses as much as digits as its factorization.

145903447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 145903447 is about 12079.0499212479. The cubic root of 145903447 is about 526.4476411718.

The spelling of 145903447 in words is "one hundred forty-five million, nine hundred three thousand, four hundred forty-seven".