3491558381 has 2 divisors, whose sum is σ = 3491558382. Its totient is φ = 3491558380.

The previous prime is 3491558347. The next prime is 3491558383. The reversal of 3491558381 is 1838551943.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2630664100 + 860894281 = 51290^2 + 29341^2 .

It is a cyclic number.

It is not a de Polignac number, because 3491558381 - 2²⁶ = 3424449517 is a prime.

It is a super-2 number, since 2×3491558381² = 24381959855862682322, which contains 22 as substring.

Together with 3491558383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3491558383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1745779190 + 1745779191.

It is an arithmetic number, because the mean of its divisors is an integer number (1745779191).

Almost surely, 2^3491558381 is an apocalyptic number.

It is an amenable number.

3491558381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3491558381 is an equidigital number, since it uses as much as digits as its factorization.

3491558381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 47.

The square root of 3491558381 is about 59089.4100579791. The cubic root of 3491558381 is about 1517.0728495852.

The spelling of 3491558381 in words is "three billion, four hundred ninety-one million, five hundred fifty-eight thousand, three hundred eighty-one".