1097953731 has 48 divisors (see below), whose sum is σ = 1896412800. Its totient is φ = 625995216.

The previous prime is 1097953709. The next prime is 1097953807. The reversal of 1097953731 is 1373597901.

1097953731 is a `hidden beast` number, since 10 + 9 + 79 + 537 + 31 = 666.

It is not a de Polignac number, because 1097953731 - 2¹¹ = 1097951683 is a prime.

It is a super-2 number, since 2×1097953731² = 2411004790833640722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1097953331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 977136 + ... + 978258.

It is an arithmetic number, because the mean of its divisors is an integer number (39508600).

Almost surely, 2^1097953731 is an apocalyptic number.

1097953731 is a deficient number, since it is larger than the sum of its proper divisors (798459069).

1097953731 is a wasteful number, since it uses less digits than its factorization.

1097953731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885 (or 1872 counting only the distinct ones).

The product of its (nonzero) digits is 178605, while the sum is 45.

The square root of 1097953731 is about 33135.3848778010. The cubic root of 1097953731 is about 1031.6396203148.

It can be divided in two parts, 109795 and 3731, that added together give a triangular number (113526 = T₄₇₆).

The spelling of 1097953731 in words is "one billion, ninety-seven million, nine hundred fifty-three thousand, seven hundred thirty-one".