1387423953 has 12 divisors (see below), whose sum is σ = 2022787728. Its totient is φ = 916304280.

The previous prime is 1387423949. The next prime is 1387423957. The reversal of 1387423953 is 3593247831.

1387423953 is a `hidden beast` number, since 138 + 7 + 423 + 95 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (1387423949) and next prime (1387423957).

It is not a de Polignac number, because 1387423953 - 2² = 1387423949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1387423899 and 1387423908.

It is not an unprimeable number, because it can be changed into a prime (1387423957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 719403 + ... + 721328.

It is an arithmetic number, because the mean of its divisors is an integer number (168565644).

Almost surely, 2^1387423953 is an apocalyptic number.

It is an amenable number.

1387423953 is a deficient number, since it is larger than the sum of its proper divisors (635363775).

1387423953 is a wasteful number, since it uses less digits than its factorization.

1387423953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440844 (or 1440841 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 1387423953 is about 37248.1402623003. The cubic root of 1387423953 is about 1115.3291749316.

The spelling of 1387423953 in words is "one billion, three hundred eighty-seven million, four hundred twenty-three thousand, nine hundred fifty-three".