1630429901 has 4 divisors (see below), whose sum is σ = 1674495612. Its totient is φ = 1586364192.

The previous prime is 1630429883. The next prime is 1630429921. The reversal of 1630429901 is 1099240361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 836655625 + 793774276 = 28925^2 + 28174^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630429901 - 2⁶ = 1630429837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630429921) 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, 22032800 + ... + 22032873.

It is an arithmetic number, because the mean of its divisors is an integer number (418623903).

Almost surely, 2^1630429901 is an apocalyptic number.

It is an amenable number.

1630429901 is a deficient number, since it is larger than the sum of its proper divisors (44065711).

1630429901 is an equidigital number, since it uses as much as digits as its factorization.

1630429901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44065710.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 1630429901 is about 40378.5822064123. The cubic root of 1630429901 is about 1176.9753766937.

The spelling of 1630429901 in words is "one billion, six hundred thirty million, four hundred twenty-nine thousand, nine hundred one".