1958491031 has 4 divisors (see below), whose sum is σ = 2238275472. Its totient is φ = 1678706592.

The previous prime is 1958491021. The next prime is 1958491037. The reversal of 1958491031 is 1301948591.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1958491031 is a prime.

It is a super-2 number, since 2×1958491031² = 7671374237014885922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1958491031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1958491037) 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, 139892210 + ... + 139892223.

It is an arithmetic number, because the mean of its divisors is an integer number (559568868).

Almost surely, 2^1958491031 is an apocalyptic number.

1958491031 is a deficient number, since it is larger than the sum of its proper divisors (279784441).

1958491031 is an equidigital number, since it uses as much as digits as its factorization.

1958491031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279784440.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 1958491031 is about 44254.8418932889. The cubic root of 1958491031 is about 1251.1437065092.

The spelling of 1958491031 in words is "one billion, nine hundred fifty-eight million, four hundred ninety-one thousand, thirty-one".