628697087 has 2 divisors, whose sum is σ = 628697088. Its totient is φ = 628697086.

The previous prime is 628697071. The next prime is 628697101. The reversal of 628697087 is 780796826.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628697087 - 2⁴ = 628697071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628690087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314348543 + 314348544.

It is an arithmetic number, because the mean of its divisors is an integer number (314348544).

Almost surely, 2^628697087 is an apocalyptic number.

628697087 is a deficient number, since it is larger than the sum of its proper divisors (1).

628697087 is an equidigital number, since it uses as much as digits as its factorization.

628697087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The square root of 628697087 is about 25073.8327146051. The cubic root of 628697087 is about 856.6705080567.

The spelling of 628697087 in words is "six hundred twenty-eight million, six hundred ninety-seven thousand, eighty-seven".