1231707867 has 16 divisors (see below), whose sum is σ = 1809739008. Its totient is φ = 740345760.

The previous prime is 1231707853. The next prime is 1231707877. The reversal of 1231707867 is 7687071321.

It is a happy number.

It is not a de Polignac number, because 1231707867 - 2¹¹ = 1231705819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231707877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365559 + ... + 368912.

It is an arithmetic number, because the mean of its divisors is an integer number (113108688).

Almost surely, 2^1231707867 is an apocalyptic number.

1231707867 is a deficient number, since it is larger than the sum of its proper divisors (578031141).

1231707867 is a wasteful number, since it uses less digits than its factorization.

1231707867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734530.

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 1231707867 is about 35095.6958472118. The cubic root of 1231707867 is about 1071.9369425647.

The spelling of 1231707867 in words is "one billion, two hundred thirty-one million, seven hundred seven thousand, eight hundred sixty-seven".