40647963 has 4 divisors (see below), whose sum is σ = 54197288. Its totient is φ = 27098640.

The previous prime is 40647961. The next prime is 40647977. The reversal of 40647963 is 36974604.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40647963 - 2¹ = 40647961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40647961) 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, 6774658 + ... + 6774663.

It is an arithmetic number, because the mean of its divisors is an integer number (13549322).

Almost surely, 2^40647963 is an apocalyptic number.

40647963 is a deficient number, since it is larger than the sum of its proper divisors (13549325).

40647963 is a wasteful number, since it uses less digits than its factorization.

40647963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13549324.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 40647963 is about 6375.5755034350. The cubic root of 40647963 is about 343.8319752484.

The spelling of 40647963 in words is "forty million, six hundred forty-seven thousand, nine hundred sixty-three".