31401743 has 2 divisors, whose sum is σ = 31401744. Its totient is φ = 31401742.

The previous prime is 31401709. The next prime is 31401767. The reversal of 31401743 is 34710413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31401743 - 2¹² = 31397647 is a prime.

It is a super-3 number, since 3×31401743³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31401043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700871 + 15700872.

It is an arithmetic number, because the mean of its divisors is an integer number (15700872).

Almost surely, 2^31401743 is an apocalyptic number.

31401743 is a deficient number, since it is larger than the sum of its proper divisors (1).

31401743 is an equidigital number, since it uses as much as digits as its factorization.

31401743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 31401743 is about 5603.7258141347. The cubic root of 31401743 is about 315.4892640277.

The spelling of 31401743 in words is "thirty-one million, four hundred one thousand, seven hundred forty-three".