2691937061 has 4 divisors (see below), whose sum is σ = 2936658624. Its totient is φ = 2447215500.

The previous prime is 2691937051. The next prime is 2691937067. The reversal of 2691937061 is 1607391962.

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 2691937061 - 2¹⁸ = 2691674917 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 (2691937067) 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, 122360765 + ... + 122360786.

It is an arithmetic number, because the mean of its divisors is an integer number (734164656).

Almost surely, 2^2691937061 is an apocalyptic number.

It is an amenable number.

2691937061 is a deficient number, since it is larger than the sum of its proper divisors (244721563).

2691937061 is a wasteful number, since it uses less digits than its factorization.

2691937061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244721562.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 2691937061 is about 51883.8805507067. The cubic root of 2691937061 is about 1391.0891625590.

The spelling of 2691937061 in words is "two billion, six hundred ninety-one million, nine hundred thirty-seven thousand, sixty-one".