145764197 has 4 divisors (see below), whose sum is σ = 148153836. Its totient is φ = 143374560.

The previous prime is 145764163. The next prime is 145764211. The reversal of 145764197 is 791467541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14753281 + 131010916 = 3841^2 + 11446^2 .

It is a cyclic number.

It is not a de Polignac number, because 145764197 - 2¹⁰ = 145763173 is a prime.

It is a super-2 number, since 2×145764197² = 42494402254109618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145764107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194728 + ... + 1194849.

It is an arithmetic number, because the mean of its divisors is an integer number (37038459).

Almost surely, 2^145764197 is an apocalyptic number.

It is an amenable number.

145764197 is a deficient number, since it is larger than the sum of its proper divisors (2389639).

145764197 is an equidigital number, since it uses as much as digits as its factorization.

145764197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389638.

The product of its digits is 211680, while the sum is 44.

The square root of 145764197 is about 12073.2844329950. The cubic root of 145764197 is about 526.2801076201.

The spelling of 145764197 in words is "one hundred forty-five million, seven hundred sixty-four thousand, one hundred ninety-seven".