681402471 has 16 divisors (see below), whose sum is σ = 937236864. Its totient is φ = 440027424.

The previous prime is 681402457. The next prime is 681402481. The reversal of 681402471 is 174204186.

It is not a de Polignac number, because 681402471 - 2¹⁴ = 681386087 is a prime.

It is a super-3 number, since 3×681402471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681402431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11676 + ... + 38718.

It is an arithmetic number, because the mean of its divisors is an integer number (58577304).

Almost surely, 2^681402471 is an apocalyptic number.

681402471 is a deficient number, since it is larger than the sum of its proper divisors (255834393).

681402471 is a wasteful number, since it uses less digits than its factorization.

681402471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27310.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 681402471 is about 26103.6869234980. The cubic root of 681402471 is about 879.9700708657.

The spelling of 681402471 in words is "six hundred eighty-one million, four hundred two thousand, four hundred seventy-one".