145963691 has 4 divisors (see below), whose sum is σ = 146028384. Its totient is φ = 145899000.

The previous prime is 145963679. The next prime is 145963693. The reversal of 145963691 is 196369541.

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

It is a cyclic number.

It is not a de Polignac number, because 145963691 - 2¹⁰ = 145962667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145963693) 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, 28835 + ... + 33516.

It is an arithmetic number, because the mean of its divisors is an integer number (36507096).

Almost surely, 2^145963691 is an apocalyptic number.

145963691 is a deficient number, since it is larger than the sum of its proper divisors (64693).

145963691 is an equidigital number, since it uses as much as digits as its factorization.

145963691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64692.

The product of its digits is 174960, while the sum is 44.

The square root of 145963691 is about 12081.5434030591. The cubic root of 145963691 is about 526.5200885065.

The spelling of 145963691 in words is "one hundred forty-five million, nine hundred sixty-three thousand, six hundred ninety-one".