54691629 has 4 divisors (see below), whose sum is σ = 72922176. Its totient is φ = 36461084.

The previous prime is 54691619. The next prime is 54691649. The reversal of 54691629 is 92619645.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54691629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54691619) 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, 9115269 + ... + 9115274.

It is an arithmetic number, because the mean of its divisors is an integer number (18230544).

Almost surely, 2^54691629 is an apocalyptic number.

It is an amenable number.

54691629 is a deficient number, since it is larger than the sum of its proper divisors (18230547).

54691629 is a wasteful number, since it uses less digits than its factorization.

54691629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18230546.

The product of its digits is 116640, while the sum is 42.

The square root of 54691629 is about 7395.3788949587. The cubic root of 54691629 is about 379.5831740638.

The spelling of 54691629 in words is "fifty-four million, six hundred ninety-one thousand, six hundred twenty-nine".