901312978 has 4 divisors (see below), whose sum is σ = 1351969470. Its totient is φ = 450656488.

The previous prime is 901312961. The next prime is 901313009. The reversal of 901312978 is 879213109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 879213109 = 8641 ⋅101749.

It can be written as a sum of positive squares in only one way, i.e., 552109009 + 349203969 = 23497^2 + 18687^2 .

It is a super-2 number, since 2×901312978² = 1624730168622456968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 901312978.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225328243 + ... + 225328246.

Almost surely, 2^901312978 is an apocalyptic number.

901312978 is a deficient number, since it is larger than the sum of its proper divisors (450656492).

901312978 is a wasteful number, since it uses less digits than its factorization.

901312978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450656491.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 901312978 is about 30021.8749914125. The cubic root of 901312978 is about 965.9586625202.

The spelling of 901312978 in words is "nine hundred one million, three hundred twelve thousand, nine hundred seventy-eight".