396531947 has 8 divisors (see below), whose sum is σ = 459562752. Its totient is φ = 335097000.

The previous prime is 396531913. The next prime is 396531991. The reversal of 396531947 is 749135693.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 396531947 - 2²⁴ = 379754731 is a prime.

It is a super-2 number, since 2×396531947² = 314475169983221618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396530947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398429 + ... + 399422.

It is an arithmetic number, because the mean of its divisors is an integer number (57445344).

Almost surely, 2^396531947 is an apocalyptic number.

396531947 is a deficient number, since it is larger than the sum of its proper divisors (63030805).

396531947 is an equidigital number, since it uses as much as digits as its factorization.

396531947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797929.

The product of its digits is 612360, while the sum is 47.

The square root of 396531947 is about 19913.1099278842. The cubic root of 396531947 is about 734.6707130966.

The spelling of 396531947 in words is "three hundred ninety-six million, five hundred thirty-one thousand, nine hundred forty-seven".