1975630381 has 8 divisors (see below), whose sum is σ = 1990605344. Its totient is φ = 1960686000.

The previous prime is 1975630373. The next prime is 1975630427. The reversal of 1975630381 is 1830365791.

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 1975630381 - 2³ = 1975630373 is a prime.

It is a super-3 number, since 3×1975630381³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1975630301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131506 + ... + 145756.

It is an arithmetic number, because the mean of its divisors is an integer number (248825668).

Almost surely, 2^1975630381 is an apocalyptic number.

It is an amenable number.

1975630381 is a deficient number, since it is larger than the sum of its proper divisors (14974963).

1975630381 is a wasteful number, since it uses less digits than its factorization.

1975630381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15291.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1975630381 is about 44448.0638610952. The cubic root of 1975630381 is about 1254.7828242796.

The spelling of 1975630381 in words is "one billion, nine hundred seventy-five million, six hundred thirty thousand, three hundred eighty-one".