145821619 has 2 divisors, whose sum is σ = 145821620. Its totient is φ = 145821618.

The previous prime is 145821601. The next prime is 145821647. The reversal of 145821619 is 916128541.

145821619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145821619 - 2¹³ = 145813427 is a prime.

It is a super-2 number, since 2×145821619² = 42527889135562322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145821649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72910809 + 72910810.

It is an arithmetic number, because the mean of its divisors is an integer number (72910810).

Almost surely, 2^145821619 is an apocalyptic number.

145821619 is a deficient number, since it is larger than the sum of its proper divisors (1).

145821619 is an equidigital number, since it uses as much as digits as its factorization.

145821619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 37.

The square root of 145821619 is about 12075.6622592717. The cubic root of 145821619 is about 526.3492057241.

The spelling of 145821619 in words is "one hundred forty-five million, eight hundred twenty-one thousand, six hundred nineteen".