401078731 has 4 divisors (see below), whose sum is σ = 402570000. Its totient is φ = 399587464.

The previous prime is 401078681. The next prime is 401078737. The reversal of 401078731 is 137870104.

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

It is a cyclic number.

It is not a de Polignac number, because 401078731 - 2²⁷ = 266861003 is a prime.

It is a super-2 number, since 2×401078731² = 321728296921140722, 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 = 401078693 and 401078702.

It is not an unprimeable number, because it can be changed into a prime (401078737) 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, 745231 + ... + 745768.

It is an arithmetic number, because the mean of its divisors is an integer number (100642500).

Almost surely, 2^401078731 is an apocalyptic number.

401078731 is a deficient number, since it is larger than the sum of its proper divisors (1491269).

401078731 is a wasteful number, since it uses less digits than its factorization.

401078731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491268.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 401078731 is about 20026.9501172795. The cubic root of 401078731 is about 737.4680517042.

The spelling of 401078731 in words is "four hundred one million, seventy-eight thousand, seven hundred thirty-one".