623850681 has 4 divisors (see below), whose sum is σ = 831800912. Its totient is φ = 415900452.

The previous prime is 623850679. The next prime is 623850737. The reversal of 623850681 is 186058326.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 623850681 - 2¹ = 623850679 is a prime.

It is a super-2 number, since 2×623850681² = 778379344368327522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623850671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103975111 + ... + 103975116.

It is an arithmetic number, because the mean of its divisors is an integer number (207950228).

Almost surely, 2^623850681 is an apocalyptic number.

It is an amenable number.

623850681 is a deficient number, since it is larger than the sum of its proper divisors (207950231).

623850681 is a wasteful number, since it uses less digits than its factorization.

623850681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207950230.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 623850681 is about 24977.0030427992. The cubic root of 623850681 is about 854.4635696711.

The spelling of 623850681 in words is "six hundred twenty-three million, eight hundred fifty thousand, six hundred eighty-one".