1230148691 has 4 divisors (see below), whose sum is σ = 1230516984. Its totient is φ = 1229780400.

The previous prime is 1230148613. The next prime is 1230148697. The reversal of 1230148691 is 1968410321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1968410321 = 83 ⋅23715787.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1230148691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1230148697) 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, 179090 + ... + 185831.

It is an arithmetic number, because the mean of its divisors is an integer number (307629246).

Almost surely, 2^1230148691 is an apocalyptic number.

1230148691 is a deficient number, since it is larger than the sum of its proper divisors (368293).

1230148691 is an equidigital number, since it uses as much as digits as its factorization.

1230148691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368292.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1230148691 is about 35073.4756047929. The cubic root of 1230148691 is about 1071.4844423885.

The spelling of 1230148691 in words is "one billion, two hundred thirty million, one hundred forty-eight thousand, six hundred ninety-one".