2130340391 has 4 divisors (see below), whose sum is σ = 2130505512. Its totient is φ = 2130175272.

The previous prime is 2130340349. The next prime is 2130340409. The reversal of 2130340391 is 1930430312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2130340391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2130340391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130340691) 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, 61400 + ... + 89613.

It is an arithmetic number, because the mean of its divisors is an integer number (532626378).

Almost surely, 2^2130340391 is an apocalyptic number.

2130340391 is a deficient number, since it is larger than the sum of its proper divisors (165121).

2130340391 is a wasteful number, since it uses less digits than its factorization.

2130340391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165120.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 2130340391 is about 46155.6106123622. The cubic root of 2130340391 is about 1286.7168864649.

The spelling of 2130340391 in words is "two billion, one hundred thirty million, three hundred forty thousand, three hundred ninety-one".