2691274987 has 8 divisors (see below), whose sum is σ = 2719189440. Its totient is φ = 2663385600.

The previous prime is 2691274979. The next prime is 2691275039. The reversal of 2691274987 is 7894721962.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2691274987 - 2³ = 2691274979 is a prime.

It is a super-2 number, since 2×2691274987² = 14485922111303700338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2691274387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273214 + ... + 282892.

It is an arithmetic number, because the mean of its divisors is an integer number (339898680).

Almost surely, 2^2691274987 is an apocalyptic number.

2691274987 is a deficient number, since it is larger than the sum of its proper divisors (27914453).

2691274987 is a wasteful number, since it uses less digits than its factorization.

2691274987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12533.

The product of its digits is 3048192, while the sum is 55.

The square root of 2691274987 is about 51877.4998144668. The cubic root of 2691274987 is about 1390.9751084459.

The spelling of 2691274987 in words is "two billion, six hundred ninety-one million, two hundred seventy-four thousand, nine hundred eighty-seven".