40147953 has 4 divisors (see below), whose sum is σ = 53530608. Its totient is φ = 26765300.

The previous prime is 40147927. The next prime is 40147957. The reversal of 40147953 is 35974104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40147953 - 2⁶ = 40147889 is a prime.

It is a super-2 number, since 2×40147953² = 3223716260180418, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40147957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6691323 + ... + 6691328.

It is an arithmetic number, because the mean of its divisors is an integer number (13382652).

Almost surely, 2^40147953 is an apocalyptic number.

It is an amenable number.

40147953 is a deficient number, since it is larger than the sum of its proper divisors (13382655).

40147953 is a wasteful number, since it uses less digits than its factorization.

40147953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13382654.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 40147953 is about 6336.2412359379. The cubic root of 40147953 is about 342.4163306374.

Subtracting from 40147953 its reverse (35974104), we obtain a square (4173849 = 2043²).

The spelling of 40147953 in words is "forty million, one hundred forty-seven thousand, nine hundred fifty-three".