40627381 has 2 divisors, whose sum is σ = 40627382. Its totient is φ = 40627380.

The previous prime is 40627373. The next prime is 40627387. The reversal of 40627381 is 18372604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24354225 + 16273156 = 4935^2 + 4034^2 .

It is a cyclic number.

It is not a de Polignac number, because 40627381 - 2³ = 40627373 is a prime.

It is a super-2 number, since 2×40627381² = 3301168173838322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40627387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20313690 + 20313691.

It is an arithmetic number, because the mean of its divisors is an integer number (20313691).

Almost surely, 2^40627381 is an apocalyptic number.

It is an amenable number.

40627381 is a deficient number, since it is larger than the sum of its proper divisors (1).

40627381 is an equidigital number, since it uses as much as digits as its factorization.

40627381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 40627381 is about 6373.9611702614. The cubic root of 40627381 is about 343.7739326147.

Adding to 40627381 its reverse (18372604), we get a palindrome (58999985).

The spelling of 40627381 in words is "forty million, six hundred twenty-seven thousand, three hundred eighty-one".