152319997 has 4 divisors (see below), whose sum is σ = 155560896. Its totient is φ = 149079100.

The previous prime is 152319971. The next prime is 152320001. The reversal of 152319997 is 799913251.

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: 799913251 = 23 ⋅34778837.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-152319997 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 (152319917) 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, 1620379 + ... + 1620472.

It is an arithmetic number, because the mean of its divisors is an integer number (38890224).

Almost surely, 2^152319997 is an apocalyptic number.

It is an amenable number.

152319997 is a deficient number, since it is larger than the sum of its proper divisors (3240899).

152319997 is an equidigital number, since it uses as much as digits as its factorization.

152319997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240898.

The product of its digits is 153090, while the sum is 46.

The square root of 152319997 is about 12341.7987748950. The cubic root of 152319997 is about 534.0545762415.

The spelling of 152319997 in words is "one hundred fifty-two million, three hundred nineteen thousand, nine hundred ninety-seven".