991347562 has 4 divisors (see below), whose sum is σ = 1487021346. Its totient is φ = 495673780.

The previous prime is 991347557. The next prime is 991347589. The reversal of 991347562 is 265743199.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 952895161 + 38452401 = 30869^2 + 6201^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247836889 + ... + 247836892.

Almost surely, 2^991347562 is an apocalyptic number.

991347562 is a deficient number, since it is larger than the sum of its proper divisors (495673784).

991347562 is a wasteful number, since it uses less digits than its factorization.

991347562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495673783.

The product of its digits is 408240, while the sum is 46.

The square root of 991347562 is about 31485.6723288546. The cubic root of 991347562 is about 997.1074954844.

It can be divided in two parts, 9913 and 47562, that added together give a palindrome (57475).

The spelling of 991347562 in words is "nine hundred ninety-one million, three hundred forty-seven thousand, five hundred sixty-two".