746721031 has 4 divisors (see below), whose sum is σ = 853395472. Its totient is φ = 640046592.

The previous prime is 746721023. The next prime is 746721043. The reversal of 746721031 is 130127647.

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 746721031 - 2³ = 746721023 is a prime.

It is a super-2 number, since 2×746721031² = 1115184596275405922, 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 = 746720984 and 746721002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (746721061) 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, 53337210 + ... + 53337223.

It is an arithmetic number, because the mean of its divisors is an integer number (213348868).

Almost surely, 2^746721031 is an apocalyptic number.

746721031 is a deficient number, since it is larger than the sum of its proper divisors (106674441).

746721031 is a wasteful number, since it uses less digits than its factorization.

746721031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106674440.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 746721031 is about 27326.1967898938. The cubic root of 746721031 is about 907.2342994459.

Adding to 746721031 its reverse (130127647), we get a palindrome (876848678).

The spelling of 746721031 in words is "seven hundred forty-six million, seven hundred twenty-one thousand, thirty-one".