2070621091 has 12 divisors (see below), whose sum is σ = 2601111856. Its totient is φ = 1613470320.

The previous prime is 2070621071. The next prime is 2070621101. The reversal of 2070621091 is 1901260702.

It is a happy number.

It is not a de Polignac number, because 2070621091 - 2⁷ = 2070620963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2070621031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1221480 + ... + 1223173.

Almost surely, 2^2070621091 is an apocalyptic number.

2070621091 is a deficient number, since it is larger than the sum of its proper divisors (530490765).

2070621091 is a wasteful number, since it uses less digits than its factorization.

2070621091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444682 (or 2444671 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 2070621091 is about 45504.0777403520. The cubic root of 2070621091 is about 1274.5793493276.

Adding to 2070621091 its reverse (1901260702), we get a palindrome (3971881793).

The spelling of 2070621091 in words is "two billion, seventy million, six hundred twenty-one thousand, ninety-one".