87949541 has 2 divisors, whose sum is σ = 87949542. Its totient is φ = 87949540.

The previous prime is 87949523. The next prime is 87949553. The reversal of 87949541 is 14594978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86397025 + 1552516 = 9295^2 + 1246^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87949541 is a prime.

It is a super-2 number, since 2×87949541² = 15470243524221362, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87949501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43974770 + 43974771.

It is an arithmetic number, because the mean of its divisors is an integer number (43974771).

Almost surely, 2^87949541 is an apocalyptic number.

It is an amenable number.

87949541 is a deficient number, since it is larger than the sum of its proper divisors (1).

87949541 is an equidigital number, since it uses as much as digits as its factorization.

87949541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 87949541 is about 9378.1416602651. The cubic root of 87949541 is about 444.7109868509.

The spelling of 87949541 in words is "eighty-seven million, nine hundred forty-nine thousand, five hundred forty-one".