40147397 has 12 divisors (see below), whose sum is σ = 43432620. Its totient is φ = 37063488.

The previous prime is 40147391. The next prime is 40147403. The reversal of 40147397 is 79374104.

It is an interprime number because it is at equal distance from previous prime (40147391) and next prime (40147403).

It can be written as a sum of positive squares in 2 ways, for example, as 32273761 + 7873636 = 5681^2 + 2806^2 .

It is not a de Polignac number, because 40147397 - 2⁴ = 40147381 is a prime.

It is a super-2 number, since 2×40147397² = 3223626971751218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40147391) 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, 14033 + ... + 16649.

It is an arithmetic number, because the mean of its divisors is an integer number (3619385).

Almost surely, 2^40147397 is an apocalyptic number.

It is an amenable number.

40147397 is a deficient number, since it is larger than the sum of its proper divisors (3285223).

40147397 is a wasteful number, since it uses less digits than its factorization.

40147397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2692 (or 2669 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 40147397 is about 6336.1973611939. The cubic root of 40147397 is about 342.4147499478.

It can be divided in two parts, 4014 and 7397, that added together give a palindrome (11411).

The spelling of 40147397 in words is "forty million, one hundred forty-seven thousand, three hundred ninety-seven".