145904419 has 2 divisors, whose sum is σ = 145904420. Its totient is φ = 145904418.

The previous prime is 145904411. The next prime is 145904441. The reversal of 145904419 is 914409541.

It is a weak prime.

It is an emirp because it is prime and its reverse (914409541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145904419 - 2³ = 145904411 is a prime.

It is a super-2 number, since 2×145904419² = 42576198967455122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145904411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72952209 + 72952210.

It is an arithmetic number, because the mean of its divisors is an integer number (72952210).

Almost surely, 2^145904419 is an apocalyptic number.

145904419 is a deficient number, since it is larger than the sum of its proper divisors (1).

145904419 is an equidigital number, since it uses as much as digits as its factorization.

145904419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 145904419 is about 12079.0901561334. The cubic root of 145904419 is about 526.4488102234.

The spelling of 145904419 in words is "one hundred forty-five million, nine hundred four thousand, four hundred nineteen".