1630147901 has 8 divisors (see below), whose sum is σ = 1729040760. Its totient is φ = 1531588608.

The previous prime is 1630147891. The next prime is 1630147907. The reversal of 1630147901 is 1097410361.

1630147901 = 28549² + 28550².

It can be written as a sum of positive squares in 4 ways, for example, as 815102500 + 815045401 = 28550^2 + 28549^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1630147901 - 2⁶ = 1630147837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630147907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73286 + ... + 92903.

It is an arithmetic number, because the mean of its divisors is an integer number (216130095).

Almost surely, 2^1630147901 is an apocalyptic number.

1630147901 is the 28550-th centered square number.

It is an amenable number.

1630147901 is a deficient number, since it is larger than the sum of its proper divisors (98892859).

1630147901 is a wasteful number, since it uses less digits than its factorization.

1630147901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166783.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1630147901 is about 40375.0901051626. The cubic root of 1630147901 is about 1176.9075160243.

The spelling of 1630147901 in words is "one billion, six hundred thirty million, one hundred forty-seven thousand, nine hundred one".