1197902939 has 4 divisors (see below), whose sum is σ = 1198402200. Its totient is φ = 1197403680.

The previous prime is 1197902921. The next prime is 1197903001. The reversal of 1197902939 is 9392097911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9392097911 = 7 ⋅1341728273.

It is a cyclic number.

It is not a de Polignac number, because 1197902939 - 2¹² = 1197898843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1197902339) 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, 246014 + ... + 250835.

It is an arithmetic number, because the mean of its divisors is an integer number (299600550).

Almost surely, 2^1197902939 is an apocalyptic number.

1197902939 is a deficient number, since it is larger than the sum of its proper divisors (499261).

1197902939 is an equidigital number, since it uses as much as digits as its factorization.

1197902939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499260.

The product of its (nonzero) digits is 275562, while the sum is 50.

The square root of 1197902939 is about 34610.7344475670. The cubic root of 1197902939 is about 1062.0391916217.

The spelling of 1197902939 in words is "one billion, one hundred ninety-seven million, nine hundred two thousand, nine hundred thirty-nine".