3940400771 has 2 divisors, whose sum is σ = 3940400772. Its totient is φ = 3940400770.

The previous prime is 3940400741. The next prime is 3940400809. The reversal of 3940400771 is 1770040493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3940400771 - 2⁶ = 3940400707 is a prime.

It is not a weakly prime, because it can be changed into another prime (3940400741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1970200385 + 1970200386.

It is an arithmetic number, because the mean of its divisors is an integer number (1970200386).

Almost surely, 2^3940400771 is an apocalyptic number.

3940400771 is a deficient number, since it is larger than the sum of its proper divisors (1).

3940400771 is an equidigital number, since it uses as much as digits as its factorization.

3940400771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 3940400771 is about 62772.6116311883. The cubic root of 3940400771 is about 1579.4775780430.

The spelling of 3940400771 in words is "three billion, nine hundred forty million, four hundred thousand, seven hundred seventy-one".