629878901 has 2 divisors, whose sum is σ = 629878902. Its totient is φ = 629878900.

The previous prime is 629878841. The next prime is 629878969. The reversal of 629878901 is 109878926.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 369024100 + 260854801 = 19210^2 + 16151^2 .

It is a cyclic number.

It is not a de Polignac number, because 629878901 - 2¹⁴ = 629862517 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 629878901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (629878001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314939450 + 314939451.

It is an arithmetic number, because the mean of its divisors is an integer number (314939451).

Almost surely, 2^629878901 is an apocalyptic number.

It is an amenable number.

629878901 is a deficient number, since it is larger than the sum of its proper divisors (1).

629878901 is an equidigital number, since it uses as much as digits as its factorization.

629878901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 629878901 is about 25097.3883302626. The cubic root of 629878901 is about 857.2069569034.

The spelling of 629878901 in words is "six hundred twenty-nine million, eight hundred seventy-eight thousand, nine hundred one".