971639551229 has 2 divisors, whose sum is σ = 971639551230. Its totient is φ = 971639551228.

The previous prime is 971639551177. The next prime is 971639551237. The reversal of 971639551229 is 922155936179.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 933175320100 + 38464231129 = 966010^2 + 196123^2 .

It is a cyclic number.

It is not a de Polignac number, because 971639551229 - 2³⁶ = 902920074493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971639551249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485819775614 + 485819775615.

It is an arithmetic number, because the mean of its divisors is an integer number (485819775615).

Almost surely, 2^971639551229 is an apocalyptic number.

It is an amenable number.

971639551229 is a deficient number, since it is larger than the sum of its proper divisors (1).

971639551229 is an equidigital number, since it uses as much as digits as its factorization.

971639551229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9185400, while the sum is 59.

The spelling of 971639551229 in words is "nine hundred seventy-one billion, six hundred thirty-nine million, five hundred fifty-one thousand, two hundred twenty-nine".