626651089 has 3 divisors (see below), whose sum is σ = 626676123. Its totient is φ = 626626056.

The previous prime is 626651071. The next prime is 626651099. The reversal of 626651089 is 980156626.

The square root of 626651089 is 25033.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 980156626 = 2 ⋅490078313.

It can be written as a sum of positive squares in only one way, i.e., 59830225 + 566820864 = 7735^2 + 23808^2 .

It is not a de Polignac number, because 626651089 - 2⁷ = 626650961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (626651009) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12517 + ... + 37549.

It is an arithmetic number, because the mean of its divisors is an integer number (208892041).

Almost surely, 2^626651089 is an apocalyptic number.

626651089 is the 25033-rd square number.

626651089 is the 12517-th centered octagonal number.

It is an amenable number.

626651089 is a deficient number, since it is larger than the sum of its proper divisors (25034).

626651089 is an frugal number, since it uses more digits than its factorization.

626651089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50066 (or 25033 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The cubic root of 626651089 is about 855.7401973262.

The spelling of 626651089 in words is "six hundred twenty-six million, six hundred fifty-one thousand, eighty-nine".