145390513 has 2 divisors, whose sum is σ = 145390514. Its totient is φ = 145390512.

The previous prime is 145390507. The next prime is 145390517. The reversal of 145390513 is 315093541.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76947984 + 68442529 = 8772^2 + 8273^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145390513 is a prime.

It is a super-2 number, since 2×145390513² = 42276802540806338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145390517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72695256 + 72695257.

It is an arithmetic number, because the mean of its divisors is an integer number (72695257).

Almost surely, 2^145390513 is an apocalyptic number.

It is an amenable number.

145390513 is a deficient number, since it is larger than the sum of its proper divisors (1).

145390513 is an equidigital number, since it uses as much as digits as its factorization.

145390513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 145390513 is about 12057.7988455605. The cubic root of 145390513 is about 525.8299953715.

The spelling of 145390513 in words is "one hundred forty-five million, three hundred ninety thousand, five hundred thirteen".