53391477 has 4 divisors (see below), whose sum is σ = 71188640. Its totient is φ = 35594316.

The previous prime is 53391467. The next prime is 53391479. The reversal of 53391477 is 77419335.

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 not a de Polignac number, because 53391477 - 2⁶ = 53391413 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 (53391479) 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, 8898577 + ... + 8898582.

It is an arithmetic number, because the mean of its divisors is an integer number (17797160).

Almost surely, 2^53391477 is an apocalyptic number.

It is an amenable number.

53391477 is a deficient number, since it is larger than the sum of its proper divisors (17797163).

53391477 is a wasteful number, since it uses less digits than its factorization.

53391477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17797162.

The product of its digits is 79380, while the sum is 39.

The square root of 53391477 is about 7306.9471737518. The cubic root of 53391477 is about 376.5511500869.

The spelling of 53391477 in words is "fifty-three million, three hundred ninety-one thousand, four hundred seventy-seven".