1971967195 has 24 divisors (see below), whose sum is σ = 2667515760. Its totient is φ = 1387857600.

The previous prime is 1971967159. The next prime is 1971967199. The reversal of 1971967195 is 5917691791.

It is not a de Polignac number, because 1971967195 - 2¹⁷ = 1971836123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971967199) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34201 + ... + 71509.

It is an arithmetic number, because the mean of its divisors is an integer number (111146490).

Almost surely, 2^1971967195 is an apocalyptic number.

1971967195 is a deficient number, since it is larger than the sum of its proper divisors (695548565).

1971967195 is a wasteful number, since it uses less digits than its factorization.

1971967195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37387 (or 37356 counting only the distinct ones).

The product of its digits is 1071630, while the sum is 55.

The square root of 1971967195 is about 44406.8372550894. The cubic root of 1971967195 is about 1254.0068109165.

The spelling of 1971967195 in words is "one billion, nine hundred seventy-one million, nine hundred sixty-seven thousand, one hundred ninety-five".