401996091 has 32 divisors (see below), whose sum is σ = 646410240. Its totient is φ = 217080864.

The previous prime is 401996051. The next prime is 401996131. The reversal of 401996091 is 190699104.

It is an interprime number because it is at equal distance from previous prime (401996051) and next prime (401996131).

It is not a de Polignac number, because 401996091 - 2⁶ = 401996027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (401996011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199696 + ... + 201698.

It is an arithmetic number, because the mean of its divisors is an integer number (20200320).

Almost surely, 2^401996091 is an apocalyptic number.

401996091 is a deficient number, since it is larger than the sum of its proper divisors (244414149).

401996091 is a wasteful number, since it uses less digits than its factorization.

401996091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2535.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 401996091 is about 20049.8401739266. The cubic root of 401996091 is about 738.0298770228.

The spelling of 401996091 in words is "four hundred one million, nine hundred ninety-six thousand, ninety-one".