1400680643 has 4 divisors (see below), whose sum is σ = 1483073640. Its totient is φ = 1318287648.

The previous prime is 1400680639. The next prime is 1400680649. The reversal of 1400680643 is 3460860041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3460860041 = 101 ⋅34265941.

It is a cyclic number.

It is not a de Polignac number, because 1400680643 - 2² = 1400680639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1400680649) 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, 41196473 + ... + 41196506.

It is an arithmetic number, because the mean of its divisors is an integer number (370768410).

Almost surely, 2^1400680643 is an apocalyptic number.

1400680643 is a deficient number, since it is larger than the sum of its proper divisors (82392997).

1400680643 is an equidigital number, since it uses as much as digits as its factorization.

1400680643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82392996.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 1400680643 is about 37425.6682371872. The cubic root of 1400680643 is about 1118.8702050422.

It can be divided in two parts, 14006 and 80643, that added together give a palindrome (94649).

The spelling of 1400680643 in words is "one billion, four hundred million, six hundred eighty thousand, six hundred forty-three".