19990629 has 24 divisors (see below), whose sum is σ = 30081792. Its totient is φ = 12778560.

The previous prime is 19990613. The next prime is 19990637. The reversal of 19990629 is 92609991.

It is a happy number.

19990629 is a `hidden beast` number, since 19 + 9 + 9 + 0 + 629 = 666.

It is not a de Polignac number, because 19990629 - 2⁴ = 19990613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19990609) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37962 + ... + 38484.

It is an arithmetic number, because the mean of its divisors is an integer number (1253408).

Almost surely, 2^19990629 is an apocalyptic number.

It is an amenable number.

19990629 is a deficient number, since it is larger than the sum of its proper divisors (10091163).

19990629 is a wasteful number, since it uses less digits than its factorization.

19990629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697 (or 694 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The square root of 19990629 is about 4471.0881225939. The cubic root of 19990629 is about 271.3993603573.

The spelling of 19990629 in words is "nineteen million, nine hundred ninety thousand, six hundred twenty-nine".