145715819 has 2 divisors, whose sum is σ = 145715820. Its totient is φ = 145715818.

The previous prime is 145715809. The next prime is 145715827. The reversal of 145715819 is 918517541.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145715819 is a prime.

It is a super-2 number, since 2×145715819² = 42466199813681522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145715809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72857909 + 72857910.

It is an arithmetic number, because the mean of its divisors is an integer number (72857910).

Almost surely, 2^145715819 is an apocalyptic number.

145715819 is a deficient number, since it is larger than the sum of its proper divisors (1).

145715819 is an equidigital number, since it uses as much as digits as its factorization.

145715819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 41.

The square root of 145715819 is about 12071.2807522649. The cubic root of 145715819 is about 526.2218784235.

The spelling of 145715819 in words is "one hundred forty-five million, seven hundred fifteen thousand, eight hundred nineteen".