628794097 has 4 divisors (see below), whose sum is σ = 629746036. Its totient is φ = 627842160.

The previous prime is 628794083. The next prime is 628794119. The reversal of 628794097 is 790497826.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 578113936 + 50680161 = 24044^2 + 7119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628794097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628794007) 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, 474978 + ... + 476299.

It is an arithmetic number, because the mean of its divisors is an integer number (157436509).

Almost surely, 2^628794097 is an apocalyptic number.

It is an amenable number.

628794097 is a deficient number, since it is larger than the sum of its proper divisors (951939).

628794097 is an equidigital number, since it uses as much as digits as its factorization.

628794097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951938.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 628794097 is about 25075.7671268498. The cubic root of 628794097 is about 856.7145681368.

The spelling of 628794097 in words is "six hundred twenty-eight million, seven hundred ninety-four thousand, ninety-seven".