145413491 has 2 divisors, whose sum is σ = 145413492. Its totient is φ = 145413490.

The previous prime is 145413481. The next prime is 145413509. The reversal of 145413491 is 194314541.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145413491 is a prime.

It is a super-2 number, since 2×145413491² = 42290166729614162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145413431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72706745 + 72706746.

It is an arithmetic number, because the mean of its divisors is an integer number (72706746).

Almost surely, 2^145413491 is an apocalyptic number.

145413491 is a deficient number, since it is larger than the sum of its proper divisors (1).

145413491 is an equidigital number, since it uses as much as digits as its factorization.

145413491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 145413491 is about 12058.7516352233. The cubic root of 145413491 is about 525.8576952191.

The spelling of 145413491 in words is "one hundred forty-five million, four hundred thirteen thousand, four hundred ninety-one".