70400129 has 4 divisors (see below), whose sum is σ = 70417200. Its totient is φ = 70383060.

The previous prime is 70400107. The next prime is 70400147. The reversal of 70400129 is 92100407.

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 70400129 - 2²⁰ = 69351553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70405129) 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, 1922 + ... + 12020.

It is an arithmetic number, because the mean of its divisors is an integer number (17604300).

Almost surely, 2^70400129 is an apocalyptic number.

It is an amenable number.

70400129 is a deficient number, since it is larger than the sum of its proper divisors (17071).

70400129 is a wasteful number, since it uses less digits than its factorization.

70400129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17070.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 70400129 is about 8390.4784726498. The cubic root of 70400129 is about 412.9122983872.

The spelling of 70400129 in words is "seventy million, four hundred thousand, one hundred twenty-nine".