145747031 has 2 divisors, whose sum is σ = 145747032. Its totient is φ = 145747030.

The previous prime is 145747009. The next prime is 145747073. The reversal of 145747031 is 130747541.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145747031 is a prime.

It is a super-2 number, since 2×145747031² = 42484394090629922, which contains 22 as substring.

It is equal to p_8218319 and since 145747031 and 8218319 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145747331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72873515 + 72873516.

It is an arithmetic number, because the mean of its divisors is an integer number (72873516).

Almost surely, 2^145747031 is an apocalyptic number.

145747031 is a deficient number, since it is larger than the sum of its proper divisors (1).

145747031 is an equidigital number, since it uses as much as digits as its factorization.

145747031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 145747031 is about 12072.5735036073. The cubic root of 145747031 is about 526.2594475880.

The spelling of 145747031 in words is "one hundred forty-five million, seven hundred forty-seven thousand, thirty-one".