406155803 has 2 divisors, whose sum is σ = 406155804. Its totient is φ = 406155802.

The previous prime is 406155793. The next prime is 406155821. The reversal of 406155803 is 308551604.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406155803 - 2²⁸ = 137720347 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 406155803.

It is not a weakly prime, because it can be changed into another prime (406155863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203077901 + 203077902.

It is an arithmetic number, because the mean of its divisors is an integer number (203077902).

Almost surely, 2^406155803 is an apocalyptic number.

406155803 is a deficient number, since it is larger than the sum of its proper divisors (1).

406155803 is an equidigital number, since it uses as much as digits as its factorization.

406155803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 406155803 is about 20153.3074952971. The cubic root of 406155803 is about 740.5667699607.

The spelling of 406155803 in words is "four hundred six million, one hundred fifty-five thousand, eight hundred three".