1211470477 has 4 divisors (see below), whose sum is σ = 1384537696. Its totient is φ = 1038403260.

The previous prime is 1211470471. The next prime is 1211470489. The reversal of 1211470477 is 7740741121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7740741121 = 17 ⋅455337713.

It is a cyclic number.

It is not a de Polignac number, because 1211470477 - 2¹⁹ = 1210946189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211470471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86533599 + ... + 86533612.

It is an arithmetic number, because the mean of its divisors is an integer number (346134424).

Almost surely, 2^1211470477 is an apocalyptic number.

It is an amenable number.

1211470477 is a deficient number, since it is larger than the sum of its proper divisors (173067219).

1211470477 is an equidigital number, since it uses as much as digits as its factorization.

1211470477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173067218.

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 1211470477 is about 34806.1844648333. The cubic root of 1211470477 is about 1066.0337269196.

The spelling of 1211470477 in words is "one billion, two hundred eleven million, four hundred seventy thousand, four hundred seventy-seven".