274926989 has 6 divisors (see below), whose sum is σ = 284499630. Its totient is φ = 265360536.

The previous prime is 274926973. The next prime is 274926991. The reversal of 274926989 is 989629472.

274926989 = 9572² + 9573² + 9574².

It can be written as a sum of positive squares in only one way, i.e., 237006025 + 37920964 = 15395^2 + 6158^2 .

It is not a de Polignac number, because 274926989 - 2⁴ = 274926973 is a prime.

It is a super-2 number, since 2×274926989² = 151169698561212242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (274926919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87752 + ... + 90830.

It is an arithmetic number, because the mean of its divisors is an integer number (47416605).

Almost surely, 2^274926989 is an apocalyptic number.

274926989 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

274926989 is a deficient number, since it is larger than the sum of its proper divisors (9572641).

274926989 is an frugal number, since it uses more digits than its factorization.

274926989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6187 (or 3108 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 56.

The square root of 274926989 is about 16580.9224411671. The cubic root of 274926989 is about 650.2381683427.

The spelling of 274926989 in words is "two hundred seventy-four million, nine hundred twenty-six thousand, nine hundred eighty-nine".