7420634391 has 4 divisors (see below), whose sum is σ = 9894179192. Its totient is φ = 4947089592.

The previous prime is 7420634383. The next prime is 7420634407. The reversal of 7420634391 is 1934360247.

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

It is not a de Polignac number, because 7420634391 - 2³ = 7420634383 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 (7420634381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1236772396 + ... + 1236772401.

It is an arithmetic number, because the mean of its divisors is an integer number (2473544798).

Almost surely, 2^7420634391 is an apocalyptic number.

7420634391 is a deficient number, since it is larger than the sum of its proper divisors (2473544801).

7420634391 is a wasteful number, since it uses less digits than its factorization.

7420634391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473544800.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 7420634391 is about 86143.1041407262. The cubic root of 7420634391 is about 1950.5047469183.

The spelling of 7420634391 in words is "seven billion, four hundred twenty million, six hundred thirty-four thousand, three hundred ninety-one".