1145623929 has 4 divisors (see below), whose sum is σ = 1527498576. Its totient is φ = 763749284.

The previous prime is 1145623909. The next prime is 1145623939. The reversal of 1145623929 is 9293265411.

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: 9293265411 = 3 ⋅3097755137.

It is a cyclic number.

It is not a de Polignac number, because 1145623929 - 2²⁴ = 1128846713 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1145623909) 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, 190937319 + ... + 190937324.

It is an arithmetic number, because the mean of its divisors is an integer number (381874644).

Almost surely, 2^1145623929 is an apocalyptic number.

It is an amenable number.

1145623929 is a deficient number, since it is larger than the sum of its proper divisors (381874647).

1145623929 is an equidigital number, since it uses as much as digits as its factorization.

1145623929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381874646.

The product of its digits is 116640, while the sum is 42.

The square root of 1145623929 is about 33847.0667709921. The cubic root of 1145623929 is about 1046.3589469017.

The spelling of 1145623929 in words is "one billion, one hundred forty-five million, six hundred twenty-three thousand, nine hundred twenty-nine".