971949901 has 16 divisors (see below), whose sum is σ = 1055577600. Its totient is φ = 889626240.

The previous prime is 971949899. The next prime is 971949911. The reversal of 971949901 is 109949179.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 971949901 - 2¹ = 971949899 is a prime.

It is a super-2 number, since 2×971949901² = 1889373220107819602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971949911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 926025 + ... + 927073.

It is an arithmetic number, because the mean of its divisors is an integer number (65973600).

Almost surely, 2^971949901 is an apocalyptic number.

It is an amenable number.

971949901 is a deficient number, since it is larger than the sum of its proper divisors (83627699).

971949901 is a wasteful number, since it uses less digits than its factorization.

971949901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596.

The product of its (nonzero) digits is 183708, while the sum is 49.

The square root of 971949901 is about 31176.1110627993. Note that the first 3 decimals coincide. The cubic root of 971949901 is about 990.5611555228.

The spelling of 971949901 in words is "nine hundred seventy-one million, nine hundred forty-nine thousand, nine hundred one".