1400009917 has 2 divisors, whose sum is σ = 1400009918. Its totient is φ = 1400009916.

The previous prime is 1400009899. The next prime is 1400009921. The reversal of 1400009917 is 7199000041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1192044676 + 207965241 = 34526^2 + 14421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1400009917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400009617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700004958 + 700004959.

It is an arithmetic number, because the mean of its divisors is an integer number (700004959).

Almost surely, 2^1400009917 is an apocalyptic number.

It is an amenable number.

1400009917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400009917 is an equidigital number, since it uses as much as digits as its factorization.

1400009917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 1400009917 is about 37416.7063889915. The cubic root of 1400009917 is about 1118.6915835128.

Adding to 1400009917 its reverse (7199000041), we get a palindrome (8599009958).

The spelling of 1400009917 in words is "one billion, four hundred million, nine thousand, nine hundred seventeen".