2126621967 has 4 divisors (see below), whose sum is σ = 2835495960. Its totient is φ = 1417747976.

The previous prime is 2126621957. The next prime is 2126621993. The reversal of 2126621967 is 7691266212.

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

It is a cyclic number.

It is not a de Polignac number, because 2126621967 - 2⁴ = 2126621951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2126621927) 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, 354436992 + ... + 354436997.

It is an arithmetic number, because the mean of its divisors is an integer number (708873990).

Almost surely, 2^2126621967 is an apocalyptic number.

2126621967 is a deficient number, since it is larger than the sum of its proper divisors (708873993).

2126621967 is an equidigital number, since it uses as much as digits as its factorization.

2126621967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708873992.

The product of its digits is 108864, while the sum is 42.

The square root of 2126621967 is about 46115.3116329056. The cubic root of 2126621967 is about 1285.9678128385.

The spelling of 2126621967 in words is "two billion, one hundred twenty-six million, six hundred twenty-one thousand, nine hundred sixty-seven".