3972261658439 has 2 divisors, whose sum is σ = 3972261658440. Its totient is φ = 3972261658438.

The previous prime is 3972261658411. The next prime is 3972261658457. The reversal of 3972261658439 is 9348561622793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3972261658439 - 2⁴⁰ = 2872750030663 is a prime.

It is a super-3 number, since 3×3972261658439³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3972261658459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1986130829219 + 1986130829220.

It is an arithmetic number, because the mean of its divisors is an integer number (1986130829220).

Almost surely, 2^{3972261658439} is an apocalyptic number.

3972261658439 is a deficient number, since it is larger than the sum of its proper divisors (1).

3972261658439 is an equidigital number, since it uses as much as digits as its factorization.

3972261658439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117573120, while the sum is 65.

The spelling of 3972261658439 in words is "three trillion, nine hundred seventy-two billion, two hundred sixty-one million, six hundred fifty-eight thousand, four hundred thirty-nine".