425687881 has 2 divisors, whose sum is σ = 425687882. Its totient is φ = 425687880.

The previous prime is 425687869. The next prime is 425687903. The reversal of 425687881 is 188786524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 379665225 + 46022656 = 19485^2 + 6784^2 .

It is a cyclic number.

It is not a de Polignac number, because 425687881 - 2¹³ = 425679689 is a prime.

It is a super-2 number, since 2×425687881² = 362420344060540322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (425687081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212843940 + 212843941.

It is an arithmetic number, because the mean of its divisors is an integer number (212843941).

Almost surely, 2^425687881 is an apocalyptic number.

It is an amenable number.

425687881 is a deficient number, since it is larger than the sum of its proper divisors (1).

425687881 is an equidigital number, since it uses as much as digits as its factorization.

425687881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 860160, while the sum is 49.

The square root of 425687881 is about 20632.2049476056. The cubic root of 425687881 is about 752.2527119809.

The spelling of 425687881 in words is "four hundred twenty-five million, six hundred eighty-seven thousand, eight hundred eighty-one".