145137613 has 4 divisors (see below), whose sum is σ = 151447968. Its totient is φ = 138827260.

The previous prime is 145137607. The next prime is 145137617. The reversal of 145137613 is 316731541.

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.

It is a cyclic number.

It is not a de Polignac number, because 145137613 - 2¹³ = 145129421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145137617) 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, 3155143 + ... + 3155188.

It is an arithmetic number, because the mean of its divisors is an integer number (37861992).

Almost surely, 2^145137613 is an apocalyptic number.

It is an amenable number.

145137613 is a deficient number, since it is larger than the sum of its proper divisors (6310355).

145137613 is an equidigital number, since it uses as much as digits as its factorization.

145137613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6310354.

The product of its digits is 7560, while the sum is 31.

The square root of 145137613 is about 12047.3072925032. The cubic root of 145137613 is about 525.5249328581.

The spelling of 145137613 in words is "one hundred forty-five million, one hundred thirty-seven thousand, six hundred thirteen".