1233720087 has 4 divisors (see below), whose sum is σ = 1644960120. Its totient is φ = 822480056.

The previous prime is 1233720079. The next prime is 1233720121. The reversal of 1233720087 is 7800273321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7800273321 = 3 ⋅2600091107.

It is a cyclic number.

It is not a de Polignac number, because 1233720087 - 2³ = 1233720079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233720017) 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, 205620012 + ... + 205620017.

It is an arithmetic number, because the mean of its divisors is an integer number (411240030).

Almost surely, 2^1233720087 is an apocalyptic number.

1233720087 is a deficient number, since it is larger than the sum of its proper divisors (411240033).

1233720087 is an equidigital number, since it uses as much as digits as its factorization.

1233720087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411240032.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 1233720087 is about 35124.3517662604. The cubic root of 1233720087 is about 1072.5203599680.

The spelling of 1233720087 in words is "one billion, two hundred thirty-three million, seven hundred twenty thousand, eighty-seven".