10392772981 has 2 divisors, whose sum is σ = 10392772982. Its totient is φ = 10392772980.

The previous prime is 10392772967. The next prime is 10392772987. The reversal of 10392772981 is 18927729301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9113566225 + 1279206756 = 95465^2 + 35766^2 .

It is a cyclic number.

It is not a de Polignac number, because 10392772981 - 2⁷ = 10392772853 is a prime.

It is a super-2 number, since 2×10392772981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10392772987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5196386490 + 5196386491.

It is an arithmetic number, because the mean of its divisors is an integer number (5196386491).

Almost surely, 2^10392772981 is an apocalyptic number.

It is an amenable number.

10392772981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10392772981 is an equidigital number, since it uses as much as digits as its factorization.

10392772981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 10392772981 in words is "ten billion, three hundred ninety-two million, seven hundred seventy-two thousand, nine hundred eighty-one".