1370440861 has 2 divisors, whose sum is σ = 1370440862. Its totient is φ = 1370440860.

The previous prime is 1370440843. The next prime is 1370440879. The reversal of 1370440861 is 1680440731.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1370440843) and next prime (1370440879).

It can be written as a sum of positive squares in only one way, i.e., 1068897636 + 301543225 = 32694^2 + 17365^2 .

It is a cyclic number.

It is not a de Polignac number, because 1370440861 - 2⁵ = 1370440829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1370440361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685220430 + 685220431.

It is an arithmetic number, because the mean of its divisors is an integer number (685220431).

Almost surely, 2^1370440861 is an apocalyptic number.

It is an amenable number.

1370440861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1370440861 is an equidigital number, since it uses as much as digits as its factorization.

1370440861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 1370440861 is about 37019.4659739981. The cubic root of 1370440861 is about 1110.7596620577.

The spelling of 1370440861 in words is "one billion, three hundred seventy million, four hundred forty thousand, eight hundred sixty-one".