145413613 has 4 divisors (see below), whose sum is σ = 151735968. Its totient is φ = 139091260.

The previous prime is 145413601. The next prime is 145413637. The reversal of 145413613 is 316314541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 316314541 = 359 ⋅881099.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145413613 is a prime.

It is a super-2 number, since 2×145413613² = 42290237691427538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145413673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3161143 + ... + 3161188.

It is an arithmetic number, because the mean of its divisors is an integer number (37933992).

Almost surely, 2^145413613 is an apocalyptic number.

It is an amenable number.

145413613 is a deficient number, since it is larger than the sum of its proper divisors (6322355).

145413613 is an equidigital number, since it uses as much as digits as its factorization.

145413613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6322354.

The product of its digits is 4320, while the sum is 28.

The square root of 145413613 is about 12058.7566937890. The cubic root of 145413613 is about 525.8578422817.

The spelling of 145413613 in words is "one hundred forty-five million, four hundred thirteen thousand, six hundred thirteen".