628437499 has 2 divisors, whose sum is σ = 628437500. Its totient is φ = 628437498.

The previous prime is 628437457. The next prime is 628437503. The reversal of 628437499 is 994734826.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628437499 - 2⁷ = 628437371 is a prime.

It is not a weakly prime, because it can be changed into another prime (628437599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314218749 + 314218750.

It is an arithmetic number, because the mean of its divisors is an integer number (314218750).

Almost surely, 2^628437499 is an apocalyptic number.

628437499 is a deficient number, since it is larger than the sum of its proper divisors (1).

628437499 is an equidigital number, since it uses as much as digits as its factorization.

628437499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 52.

The square root of 628437499 is about 25068.6557078755. The cubic root of 628437499 is about 856.5525858743.

The spelling of 628437499 in words is "six hundred twenty-eight million, four hundred thirty-seven thousand, four hundred ninety-nine".