1920129629 has 4 divisors (see below), whose sum is σ = 2094686880. Its totient is φ = 1745572380.

The previous prime is 1920129623. The next prime is 1920129661. The reversal of 1920129629 is 9269210291.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9269210291 = 11 ⋅842655481.

It is a cyclic number.

It is not a de Polignac number, because 1920129629 - 2⁴ = 1920129613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920129623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87278609 + ... + 87278630.

It is an arithmetic number, because the mean of its divisors is an integer number (523671720).

Almost surely, 2^1920129629 is an apocalyptic number.

It is an amenable number.

1920129629 is a deficient number, since it is larger than the sum of its proper divisors (174557251).

1920129629 is a wasteful number, since it uses less digits than its factorization.

1920129629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174557250.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 1920129629 is about 43819.2837572683. The cubic root of 1920129629 is about 1242.9209731022.

The spelling of 1920129629 in words is "one billion, nine hundred twenty million, one hundred twenty-nine thousand, six hundred twenty-nine".