1972297231 has 2 divisors, whose sum is σ = 1972297232. Its totient is φ = 1972297230.

The previous prime is 1972297213. The next prime is 1972297241. The reversal of 1972297231 is 1327922791.

Together with previous prime (1972297213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1972297231 - 2⁵ = 1972297199 is a prime.

It is a super-2 number, since 2×1972297231² = 7779912734820534722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1972297241) 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 as a sum of consecutive naturals, namely, 986148615 + 986148616.

It is an arithmetic number, because the mean of its divisors is an integer number (986148616).

Almost surely, 2^1972297231 is an apocalyptic number.

1972297231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972297231 is an equidigital number, since it uses as much as digits as its factorization.

1972297231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 43.

The square root of 1972297231 is about 44410.5531489983. The cubic root of 1972297231 is about 1254.0767654787.

The spelling of 1972297231 in words is "one billion, nine hundred seventy-two million, two hundred ninety-seven thousand, two hundred thirty-one".