855372403 has 2 divisors, whose sum is σ = 855372404. Its totient is φ = 855372402.

The previous prime is 855372337. The next prime is 855372409. The reversal of 855372403 is 304273558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 855372403 - 2²¹ = 853275251 is a prime.

It is equal to p_43843087 and since 855372403 and 43843087 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (855372409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427686201 + 427686202.

It is an arithmetic number, because the mean of its divisors is an integer number (427686202).

Almost surely, 2^855372403 is an apocalyptic number.

855372403 is a deficient number, since it is larger than the sum of its proper divisors (1).

855372403 is an equidigital number, since it uses as much as digits as its factorization.

855372403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 855372403 is about 29246.7502981100. The cubic root of 855372403 is about 949.2597753640.

The spelling of 855372403 in words is "eight hundred fifty-five million, three hundred seventy-two thousand, four hundred three".