78354513 has 16 divisors (see below), whose sum is σ = 122909760. Its totient is φ = 49163328.

The previous prime is 78354473. The next prime is 78354517. The reversal of 78354513 is 31545387.

It is not a de Polignac number, because 78354513 - 2⁶ = 78354449 is a prime.

It is a super-2 number, since 2×78354513² = 12278859414934338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78354517) 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, 84895 + ... + 85812.

It is an arithmetic number, because the mean of its divisors is an integer number (7681860).

Almost surely, 2^78354513 is an apocalyptic number.

It is an amenable number.

78354513 is a deficient number, since it is larger than the sum of its proper divisors (44555247).

78354513 is a wasteful number, since it uses less digits than its factorization.

78354513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170733 (or 170727 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 78354513 is about 8851.8084592924. The cubic root of 78354513 is about 427.9122032187.

The spelling of 78354513 in words is "seventy-eight million, three hundred fifty-four thousand, five hundred thirteen".