365916421 has 16 divisors (see below), whose sum is σ = 426025600. Its totient is φ = 311335488.

The previous prime is 365916391. The next prime is 365916443. The reversal of 365916421 is 124619563.

It is a cyclic number.

It is not a de Polignac number, because 365916421 - 2¹³ = 365908229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (365916121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10881 + ... + 29158.

It is an arithmetic number, because the mean of its divisors is an integer number (26626600).

Almost surely, 2^365916421 is an apocalyptic number.

It is an amenable number.

365916421 is a deficient number, since it is larger than the sum of its proper divisors (60109179).

365916421 is a wasteful number, since it uses less digits than its factorization.

365916421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40108.

The product of its digits is 38880, while the sum is 37.

The square root of 365916421 is about 19128.9419728327. The cubic root of 365916421 is about 715.2545565322.

The spelling of 365916421 in words is "three hundred sixty-five million, nine hundred sixteen thousand, four hundred twenty-one".