78470437 has 4 divisors (see below), whose sum is σ = 82600480. Its totient is φ = 74340396.

The previous prime is 78470429. The next prime is 78470473. The reversal of 78470437 is 73407487.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73407487 = 227 ⋅323381.

It is a cyclic number.

It is not a de Polignac number, because 78470437 - 2³ = 78470429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78470437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78470417) 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, 2064993 + ... + 2065030.

It is an arithmetic number, because the mean of its divisors is an integer number (20650120).

Almost surely, 2^78470437 is an apocalyptic number.

It is an amenable number.

78470437 is a deficient number, since it is larger than the sum of its proper divisors (4130043).

78470437 is a wasteful number, since it uses less digits than its factorization.

78470437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4130042.

The product of its (nonzero) digits is 131712, while the sum is 40.

The square root of 78470437 is about 8858.3540796245. The cubic root of 78470437 is about 428.1231285336.

The spelling of 78470437 in words is "seventy-eight million, four hundred seventy thousand, four hundred thirty-seven".