740470391 has 4 divisors (see below), whose sum is σ = 740629800. Its totient is φ = 740310984.

The previous prime is 740470387. The next prime is 740470403. The reversal of 740470391 is 193074047.

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

It is a cyclic number.

It is not a de Polignac number, because 740470391 - 2² = 740470387 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 (740476391) 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, 72521 + ... + 82098.

It is an arithmetic number, because the mean of its divisors is an integer number (185157450).

Almost surely, 2^740470391 is an apocalyptic number.

740470391 is a deficient number, since it is larger than the sum of its proper divisors (159409).

740470391 is a wasteful number, since it uses less digits than its factorization.

740470391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159408.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 740470391 is about 27211.5856024598. The cubic root of 740470391 is about 904.6957824892.

The spelling of 740470391 in words is "seven hundred forty million, four hundred seventy thousand, three hundred ninety-one".