3951249099 has 16 divisors (see below), whose sum is σ = 6021926400. Its totient is φ = 2257490880.

The previous prime is 3951249079. The next prime is 3951249109. The reversal of 3951249099 is 9909421593.

It is a happy number.

It is not a de Polignac number, because 3951249099 - 2⁷ = 3951248971 is a prime.

It is a super-2 number, since 2×3951249099² = 31224738884696623602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3951249079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169639 + ... + 191519.

It is an arithmetic number, because the mean of its divisors is an integer number (376370400).

Almost surely, 2^3951249099 is an apocalyptic number.

3951249099 is a deficient number, since it is larger than the sum of its proper divisors (2070677301).

3951249099 is a wasteful number, since it uses less digits than its factorization.

3951249099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30490.

The product of its (nonzero) digits is 787320, while the sum is 51.

The square root of 3951249099 is about 62858.9619624760. The cubic root of 3951249099 is about 1580.9257378720.

The spelling of 3951249099 in words is "three billion, nine hundred fifty-one million, two hundred forty-nine thousand, ninety-nine".