6900400631 has 4 divisors (see below), whose sum is σ = 6983538072. Its totient is φ = 6817263192.

The previous prime is 6900400609. The next prime is 6900400649. The reversal of 6900400631 is 1360040096.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6900400631 is a prime.

It is a super-3 number, since 3×6900400631³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6900400594 and 6900400603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6900400531) 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, 41568596 + ... + 41568761.

It is an arithmetic number, because the mean of its divisors is an integer number (1745884518).

Almost surely, 2^6900400631 is an apocalyptic number.

6900400631 is a deficient number, since it is larger than the sum of its proper divisors (83137441).

6900400631 is an equidigital number, since it uses as much as digits as its factorization.

6900400631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83137440.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 6900400631 is about 83068.6501094125. The cubic root of 6900400631 is about 1903.8151072690.

The spelling of 6900400631 in words is "six billion, nine hundred million, four hundred thousand, six hundred thirty-one".