3486400991 has 4 divisors (see below), whose sum is σ = 3669895800. Its totient is φ = 3302906184.

The previous prime is 3486400979. The next prime is 3486400993. The reversal of 3486400991 is 1990046843.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1990046843 = 17 ⋅117061579.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3486400991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3486400993) 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, 91747376 + ... + 91747413.

It is an arithmetic number, because the mean of its divisors is an integer number (917473950).

Almost surely, 2^3486400991 is an apocalyptic number.

3486400991 is a deficient number, since it is larger than the sum of its proper divisors (183494809).

3486400991 is a wasteful number, since it uses less digits than its factorization.

3486400991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183494808.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 3486400991 is about 59045.7533697386. The cubic root of 3486400991 is about 1516.3255240833.

The spelling of 3486400991 in words is "three billion, four hundred eighty-six million, four hundred thousand, nine hundred ninety-one".