4015917949 has 2 divisors, whose sum is σ = 4015917950. Its totient is φ = 4015917948.

The previous prime is 4015917943. The next prime is 4015918043. The reversal of 4015917949 is 9497195104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3999677049 + 16240900 = 63243^2 + 4030^2 .

It is a cyclic number.

It is not a de Polignac number, because 4015917949 - 2¹³ = 4015909757 is a prime.

It is a super-2 number, since 2×4015917949² = 32255193946200733202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4015917943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2007958974 + 2007958975.

It is an arithmetic number, because the mean of its divisors is an integer number (2007958975).

Almost surely, 2^4015917949 is an apocalyptic number.

It is an amenable number.

4015917949 is a deficient number, since it is larger than the sum of its proper divisors (1).

4015917949 is an equidigital number, since it uses as much as digits as its factorization.

4015917949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 4015917949 is about 63371.2706910632. The cubic root of 4015917949 is about 1589.5039456995.

The spelling of 4015917949 in words is "four billion, fifteen million, nine hundred seventeen thousand, nine hundred forty-nine".