406999157 has 2 divisors, whose sum is σ = 406999158. Its totient is φ = 406999156.

The previous prime is 406999141. The next prime is 406999183. The reversal of 406999157 is 751999604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401040676 + 5958481 = 20026^2 + 2441^2 .

It is a cyclic number.

It is not a de Polignac number, because 406999157 - 2⁴ = 406999141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406999127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203499578 + 203499579.

It is an arithmetic number, because the mean of its divisors is an integer number (203499579).

Almost surely, 2^406999157 is an apocalyptic number.

It is an amenable number.

406999157 is a deficient number, since it is larger than the sum of its proper divisors (1).

406999157 is an equidigital number, since it uses as much as digits as its factorization.

406999157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 406999157 is about 20174.2201088419. The cubic root of 406999157 is about 741.0789938873.

The spelling of 406999157 in words is "four hundred six million, nine hundred ninety-nine thousand, one hundred fifty-seven".