2891291654 has 4 divisors (see below), whose sum is σ = 4336937484. Its totient is φ = 1445645826.

The previous prime is 2891291653. The next prime is 2891291671. The reversal of 2891291654 is 4561921982.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2891291599 and 2891291608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2891291651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722822912 + ... + 722822915.

It is an arithmetic number, because the mean of its divisors is an integer number (1084234371).

Almost surely, 2^2891291654 is an apocalyptic number.

2891291654 is a deficient number, since it is larger than the sum of its proper divisors (1445645830).

2891291654 is a wasteful number, since it uses less digits than its factorization.

2891291654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445645829.

The product of its digits is 311040, while the sum is 47.

The square root of 2891291654 is about 53770.7323178697. The cubic root of 2891291654 is about 1424.6143048085.

The spelling of 2891291654 in words is "two billion, eight hundred ninety-one million, two hundred ninety-one thousand, six hundred fifty-four".