1993953 has 32 divisors (see below), whose sum is σ = 3104640. Its totient is φ = 1128960.

The previous prime is 1993949. The next prime is 1993963. The reversal of 1993953 is 3593991.

It is not a de Polignac number, because 1993953 - 2² = 1993949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1993933) 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, 46350 + ... + 46392.

It is an arithmetic number, because the mean of its divisors is an integer number (97020).

2^1993953 is an apocalyptic number.

1993953 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1993953 is a deficient number, since it is larger than the sum of its proper divisors (1110687).

1993953 is a wasteful number, since it uses less digits than its factorization.

1993953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129.

The product of its digits is 32805, while the sum is 39.

The square root of 1993953 is about 1412.0740065591. The cubic root of 1993953 is about 125.8649977572.

The spelling of 1993953 in words is "one million, nine hundred ninety-three thousand, nine hundred fifty-three".