699651049 has 2 divisors, whose sum is σ = 699651050. Its totient is φ = 699651048.

The previous prime is 699651047. The next prime is 699651067. The reversal of 699651049 is 940156996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 558991449 + 140659600 = 23643^2 + 11860^2 .

It is a cyclic number.

It is not a de Polignac number, because 699651049 - 2¹ = 699651047 is a prime.

Together with 699651047, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 699650993 and 699651011.

It is not a weakly prime, because it can be changed into another prime (699651047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349825524 + 349825525.

It is an arithmetic number, because the mean of its divisors is an integer number (349825525).

Almost surely, 2^699651049 is an apocalyptic number.

It is an amenable number.

699651049 is a deficient number, since it is larger than the sum of its proper divisors (1).

699651049 is an equidigital number, since it uses as much as digits as its factorization.

699651049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 49.

The square root of 699651049 is about 26450.9177345513. The cubic root of 699651049 is about 887.7564367483.

The spelling of 699651049 in words is "six hundred ninety-nine million, six hundred fifty-one thousand, forty-nine".