2138550697 has 4 divisors (see below), whose sum is σ = 2139247440. Its totient is φ = 2137853956.

The previous prime is 2138550677. The next prime is 2138550703. The reversal of 2138550697 is 7960558312.

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.

It is a cyclic number.

It is not a de Polignac number, because 2138550697 - 2⁷ = 2138550569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2138550607) 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, 343747 + ... + 349912.

It is an arithmetic number, because the mean of its divisors is an integer number (534811860).

Almost surely, 2^2138550697 is an apocalyptic number.

It is an amenable number.

2138550697 is a deficient number, since it is larger than the sum of its proper divisors (696743).

2138550697 is an equidigital number, since it uses as much as digits as its factorization.

2138550697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696742.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 2138550697 is about 46244.4666635912. The cubic root of 2138550697 is about 1288.3677645420.

The spelling of 2138550697 in words is "two billion, one hundred thirty-eight million, five hundred fifty thousand, six hundred ninety-seven".