1405902993 has 12 divisors (see below), whose sum is σ = 2060442384. Its totient is φ = 852062200.

The previous prime is 1405902959. The next prime is 1405903001. The reversal of 1405902993 is 3992095041.

It is not a de Polignac number, because 1405902993 - 2¹⁰ = 1405901969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1405902913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1936143 + ... + 1936868.

It is an arithmetic number, because the mean of its divisors is an integer number (171703532).

Almost surely, 2^1405902993 is an apocalyptic number.

It is an amenable number.

1405902993 is a deficient number, since it is larger than the sum of its proper divisors (654539391).

1405902993 is a wasteful number, since it uses less digits than its factorization.

1405902993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873036 (or 3873025 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 1405902993 is about 37495.3729545393. The cubic root of 1405902993 is about 1120.2590262396.

The spelling of 1405902993 in words is "one billion, four hundred five million, nine hundred two thousand, nine hundred ninety-three".