2690987293 has 4 divisors (see below), whose sum is σ = 2691328860. Its totient is φ = 2690645728.

The previous prime is 2690987269. The next prime is 2690987297. The reversal of 2690987293 is 3927890962.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3927890962 = 2 ⋅1963945481.

It can be written as a sum of positive squares in 2 ways, for example, as 170746489 + 2520240804 = 13067^2 + 50202^2 .

It is a cyclic number.

It is not a de Polignac number, because 2690987293 - 2⁵ = 2690987261 is a prime.

It is a super-2 number, since 2×2690987293² = 14482825222174935698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2690987297) 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, 158680 + ... + 174817.

It is an arithmetic number, because the mean of its divisors is an integer number (672832215).

Almost surely, 2^2690987293 is an apocalyptic number.

It is an amenable number.

2690987293 is a deficient number, since it is larger than the sum of its proper divisors (341567).

2690987293 is an equidigital number, since it uses as much as digits as its factorization.

2690987293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341566.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The square root of 2690987293 is about 51874.7269197632. The cubic root of 2690987293 is about 1390.9255421678.

The spelling of 2690987293 in words is "two billion, six hundred ninety million, nine hundred eighty-seven thousand, two hundred ninety-three".