1397478011 has 2 divisors, whose sum is σ = 1397478012. Its totient is φ = 1397478010.

The previous prime is 1397477981. The next prime is 1397478023. The reversal of 1397478011 is 1108747931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1397478011 - 2⁶ = 1397477947 is a prime.

It is a super-2 number, since 2×1397478011² = 3905889582457032242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1397478011.

It is not a weakly prime, because it can be changed into another prime (1397478031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698739005 + 698739006.

It is an arithmetic number, because the mean of its divisors is an integer number (698739006).

Almost surely, 2^1397478011 is an apocalyptic number.

1397478011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397478011 is an equidigital number, since it uses as much as digits as its factorization.

1397478011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 41.

The square root of 1397478011 is about 37382.8571807988. The cubic root of 1397478011 is about 1118.0167951689.

The spelling of 1397478011 in words is "one billion, three hundred ninety-seven million, four hundred seventy-eight thousand, eleven".