145908493 has 4 divisors (see below), whose sum is σ = 146069568. Its totient is φ = 145747420.

The previous prime is 145908491. The next prime is 145908509. The reversal of 145908493 is 394809541.

It is a happy number.

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 145908493 - 2¹ = 145908491 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 (145908491) 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, 79171 + ... + 80992.

It is an arithmetic number, because the mean of its divisors is an integer number (36517392).

Almost surely, 2^145908493 is an apocalyptic number.

It is an amenable number.

145908493 is a deficient number, since it is larger than the sum of its proper divisors (161075).

145908493 is an equidigital number, since it uses as much as digits as its factorization.

145908493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161074.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 145908493 is about 12079.2587934856. The cubic root of 145908493 is about 526.4537100807.

The spelling of 145908493 in words is "one hundred forty-five million, nine hundred eight thousand, four hundred ninety-three".