3551958749 has 2 divisors, whose sum is σ = 3551958750. Its totient is φ = 3551958748.

The previous prime is 3551958653. The next prime is 3551958779. The reversal of 3551958749 is 9478591553.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2507505625 + 1044453124 = 50075^2 + 32318^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3551958749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3551958694 and 3551958703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3551958779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1775979374 + 1775979375.

It is an arithmetic number, because the mean of its divisors is an integer number (1775979375).

Almost surely, 2^3551958749 is an apocalyptic number.

It is an amenable number.

3551958749 is a deficient number, since it is larger than the sum of its proper divisors (1).

3551958749 is an equidigital number, since it uses as much as digits as its factorization.

3551958749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804000, while the sum is 56.

The square root of 3551958749 is about 59598.3116287702. The cubic root of 3551958749 is about 1525.7708186335.

The spelling of 3551958749 in words is "three billion, five hundred fifty-one million, nine hundred fifty-eight thousand, seven hundred forty-nine".