129701887 has 4 divisors (see below), whose sum is σ = 148230736. Its totient is φ = 111173040.

The previous prime is 129701867. The next prime is 129701893. The reversal of 129701887 is 788107921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788107921 = 131 ⋅6016091.

It is a cyclic number.

It is not a de Polignac number, because 129701887 - 2¹¹ = 129699839 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 (129701827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9264414 + ... + 9264427.

It is an arithmetic number, because the mean of its divisors is an integer number (37057684).

Almost surely, 2^129701887 is an apocalyptic number.

129701887 is a deficient number, since it is larger than the sum of its proper divisors (18528849).

129701887 is an equidigital number, since it uses as much as digits as its factorization.

129701887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18528848.

The product of its (nonzero) digits is 56448, while the sum is 43.

The square root of 129701887 is about 11388.6736277760. The cubic root of 129701887 is about 506.1921799128.

The spelling of 129701887 in words is "one hundred twenty-nine million, seven hundred one thousand, eight hundred eighty-seven".