40170961 has 2 divisors, whose sum is σ = 40170962. Its totient is φ = 40170960.

The previous prime is 40170943. The next prime is 40170967. The reversal of 40170961 is 16907104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38825361 + 1345600 = 6231^2 + 1160^2 .

It is a cyclic number.

It is not a de Polignac number, because 40170961 - 2¹¹ = 40168913 is a prime.

It is a super-2 number, since 2×40170961² = 3227412215327042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40170967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20085480 + 20085481.

It is an arithmetic number, because the mean of its divisors is an integer number (20085481).

Almost surely, 2^40170961 is an apocalyptic number.

It is an amenable number.

40170961 is a deficient number, since it is larger than the sum of its proper divisors (1).

40170961 is an equidigital number, since it uses as much as digits as its factorization.

40170961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 40170961 is about 6338.0565633323. The cubic root of 40170961 is about 342.4817288280.

The spelling of 40170961 in words is "forty million, one hundred seventy thousand, nine hundred sixty-one".