2120377391 has 8 divisors (see below), whose sum is σ = 2314272384. Its totient is φ = 1926671320.

The previous prime is 2120377381. The next prime is 2120377423. The reversal of 2120377391 is 1937730212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120377391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120377321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23225 + ... + 69138.

It is an arithmetic number, because the mean of its divisors is an integer number (289284048).

Almost surely, 2^2120377391 is an apocalyptic number.

2120377391 is a deficient number, since it is larger than the sum of its proper divisors (193894993).

2120377391 is a wasteful number, since it uses less digits than its factorization.

2120377391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94461.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 2120377391 is about 46047.5557548932. Note that the first 3 decimals coincide. The cubic root of 2120377391 is about 1284.7078809296.

The spelling of 2120377391 in words is "two billion, one hundred twenty million, three hundred seventy-seven thousand, three hundred ninety-one".