1972122473 has 2 divisors, whose sum is σ = 1972122474. Its totient is φ = 1972122472.

The previous prime is 1972122469. The next prime is 1972122479. The reversal of 1972122473 is 3742212791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1628687449 + 343435024 = 40357^2 + 18532^2 .

It is a cyclic number.

It is not a de Polignac number, because 1972122473 - 2² = 1972122469 is a prime.

It is not a weakly prime, because it can be changed into another prime (1972122479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986061236 + 986061237.

It is an arithmetic number, because the mean of its divisors is an integer number (986061237).

Almost surely, 2^1972122473 is an apocalyptic number.

It is an amenable number.

1972122473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972122473 is an equidigital number, since it uses as much as digits as its factorization.

1972122473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 1972122473 is about 44408.5855775660. The cubic root of 1972122473 is about 1254.0397246755.

The spelling of 1972122473 in words is "one billion, nine hundred seventy-two million, one hundred twenty-two thousand, four hundred seventy-three".