78492953 has 24 divisors (see below), whose sum is σ = 100613664. Its totient is φ = 60547200.

The previous prime is 78492929. The next prime is 78492959. The reversal of 78492953 is 35929487.

It is a happy number.

It is not a de Polignac number, because 78492953 - 2¹⁰ = 78491929 is a prime.

It is a super-2 number, since 2×78492953² = 12322287341320418, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78492898 and 78492907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78492959) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56993 + ... + 58353.

It is an arithmetic number, because the mean of its divisors is an integer number (4192236).

Almost surely, 2^78492953 is an apocalyptic number.

It is an amenable number.

78492953 is a deficient number, since it is larger than the sum of its proper divisors (22120711).

78492953 is a wasteful number, since it uses less digits than its factorization.

78492953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493 (or 1486 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The square root of 78492953 is about 8859.6248791921. The cubic root of 78492953 is about 428.1640726092.

The spelling of 78492953 in words is "seventy-eight million, four hundred ninety-two thousand, nine hundred fifty-three".