129488077 has 4 divisors (see below), whose sum is σ = 129511296. Its totient is φ = 129464860.

The previous prime is 129488071. The next prime is 129488081. The reversal of 129488077 is 770884921.

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.

It is a cyclic number.

It is not a de Polignac number, because 129488077 - 2¹⁹ = 128963789 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 (129488071) 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, 2358 + ... + 16264.

It is an arithmetic number, because the mean of its divisors is an integer number (32377824).

Almost surely, 2^129488077 is an apocalyptic number.

It is an amenable number.

129488077 is a deficient number, since it is larger than the sum of its proper divisors (23219).

129488077 is an equidigital number, since it uses as much as digits as its factorization.

129488077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23218.

The product of its (nonzero) digits is 225792, while the sum is 46.

The square root of 129488077 is about 11379.2827981380. The cubic root of 129488077 is about 505.9138789622.

It can be divided in two parts, 12948 and 8077, that added together give a square (21025 = 145²).

The spelling of 129488077 in words is "one hundred twenty-nine million, four hundred eighty-eight thousand, seventy-seven".