1200923137 has 4 divisors (see below), whose sum is σ = 1205948160. Its totient is φ = 1195898116.

The previous prime is 1200923093. The next prime is 1200923149. The reversal of 1200923137 is 7313290021.

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: 7313290021 = 4211 ⋅1736711.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200923137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200927137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2512153 + ... + 2512630.

It is an arithmetic number, because the mean of its divisors is an integer number (301487040).

Almost surely, 2^1200923137 is an apocalyptic number.

It is an amenable number.

1200923137 is a deficient number, since it is larger than the sum of its proper divisors (5025023).

1200923137 is an equidigital number, since it uses as much as digits as its factorization.

1200923137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5025022.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 1200923137 is about 34654.3379247101. The cubic root of 1200923137 is about 1062.9309936275.

The spelling of 1200923137 in words is "one billion, two hundred million, nine hundred twenty-three thousand, one hundred thirty-seven".