3551097749 has 4 divisors (see below), whose sum is σ = 3573716364. Its totient is φ = 3528479136.

The previous prime is 3551097727. The next prime is 3551097761. The reversal of 3551097749 is 9477901553.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9477901553 = 1321 ⋅7174793.

It can be written as a sum of positive squares in 2 ways, for example, as 2489511025 + 1061586724 = 49895^2 + 32582^2 .

It is a cyclic number.

It is not a de Polignac number, because 3551097749 - 2²⁸ = 3282662293 is a prime.

It is a super-2 number, since 2×3551097749² = 25220590445905734002, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3551097697 and 3551097706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3551097349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11309072 + ... + 11309385.

It is an arithmetic number, because the mean of its divisors is an integer number (893429091).

Almost surely, 2^3551097749 is an apocalyptic number.

It is an amenable number.

3551097749 is a deficient number, since it is larger than the sum of its proper divisors (22618615).

3551097749 is a wasteful number, since it uses less digits than its factorization.

3551097749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22618614.

The product of its (nonzero) digits is 1190700, while the sum is 50.

The square root of 3551097749 is about 59591.0878319904. The cubic root of 3551097749 is about 1525.6475256442.

The spelling of 3551097749 in words is "three billion, five hundred fifty-one million, ninety-seven thousand, seven hundred forty-nine".