400696121 has 4 divisors (see below), whose sum is σ = 457938432. Its totient is φ = 343453812.

The previous prime is 400696057. The next prime is 400696123. The reversal of 400696121 is 121696004.

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 400696121 - 2⁶ = 400696057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400696123) 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, 28621145 + ... + 28621158.

It is an arithmetic number, because the mean of its divisors is an integer number (114484608).

Almost surely, 2^400696121 is an apocalyptic number.

It is an amenable number.

400696121 is a deficient number, since it is larger than the sum of its proper divisors (57242311).

400696121 is an equidigital number, since it uses as much as digits as its factorization.

400696121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57242310.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 400696121 is about 20017.3954599493. The cubic root of 400696121 is about 737.2334739682.

The spelling of 400696121 in words is "four hundred million, six hundred ninety-six thousand, one hundred twenty-one".