281925123397 has 2 divisors, whose sum is σ = 281925123398. Its totient is φ = 281925123396.

The previous prime is 281925123377. The next prime is 281925123511. The reversal of 281925123397 is 793321529182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267000591841 + 14924531556 = 516721^2 + 122166^2 .

It is a cyclic number.

It is not a de Polignac number, because 281925123397 - 2³¹ = 279777639749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281925123377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140962561698 + 140962561699.

It is an arithmetic number, because the mean of its divisors is an integer number (140962561699).

Almost surely, 2^281925123397 is an apocalyptic number.

It is an amenable number.

281925123397 is a deficient number, since it is larger than the sum of its proper divisors (1).

281925123397 is an equidigital number, since it uses as much as digits as its factorization.

281925123397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The spelling of 281925123397 in words is "two hundred eighty-one billion, nine hundred twenty-five million, one hundred twenty-three thousand, three hundred ninety-seven".