145847919 has 8 divisors (see below), whose sum is σ = 222244480. Its totient is φ = 83341656.

The previous prime is 145847893. The next prime is 145847921. The reversal of 145847919 is 919748541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145847919 - 2⁵ = 145847887 is a prime.

It is a super-2 number, since 2×145847919² = 42543230953261122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145847929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3472549 + ... + 3472590.

It is an arithmetic number, because the mean of its divisors is an integer number (27780560).

Almost surely, 2^145847919 is an apocalyptic number.

145847919 is a deficient number, since it is larger than the sum of its proper divisors (76396561).

145847919 is an equidigital number, since it uses as much as digits as its factorization.

145847919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6945149.

The product of its digits is 362880, while the sum is 48.

The square root of 145847919 is about 12076.7511773655. The cubic root of 145847919 is about 526.3808474703.

The spelling of 145847919 in words is "one hundred forty-five million, eight hundred forty-seven thousand, nine hundred nineteen".