145919597 has 4 divisors (see below), whose sum is σ = 149313120. Its totient is φ = 142526076.

The previous prime is 145919591. The next prime is 145919617. The reversal of 145919597 is 795919541.

145919597 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 795919541 = 127 ⋅6267083.

It is a cyclic number.

It is not a de Polignac number, because 145919597 - 2⁴ = 145919581 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 (145919591) 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, 1696697 + ... + 1696782.

It is an arithmetic number, because the mean of its divisors is an integer number (37328280).

Almost surely, 2^145919597 is an apocalyptic number.

It is an amenable number.

145919597 is a deficient number, since it is larger than the sum of its proper divisors (3393523).

145919597 is an equidigital number, since it uses as much as digits as its factorization.

145919597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393522.

The product of its digits is 510300, while the sum is 50.

The square root of 145919597 is about 12079.7184155923. The cubic root of 145919597 is about 526.4670645551.

The spelling of 145919597 in words is "one hundred forty-five million, nine hundred nineteen thousand, five hundred ninety-seven".