10513978 has 4 divisors (see below), whose sum is σ = 15770970. Its totient is φ = 5256988.

The previous prime is 10513969. The next prime is 10514003. The reversal of 10513978 is 87931501.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 7634169 + 2879809 = 2763^2 + 1697^2 .

It is a super-2 number, since 2×10513978² = 221087466768968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2628493 + ... + 2628496.

Almost surely, 2^10513978 is an apocalyptic number.

10513978 is a deficient number, since it is larger than the sum of its proper divisors (5256992).

10513978 is an equidigital number, since it uses as much as digits as its factorization.

10513978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5256991.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 10513978 is about 3242.5264840861. The cubic root of 10513978 is about 219.0730836195.

The spelling of 10513978 in words is "ten million, five hundred thirteen thousand, nine hundred seventy-eight".